     xboard(6)                           GNU                           xboard(6)
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     NAME
          xboard - X graphical user interface for chess

     SYNOPSIS
          xboard [options]
          xboard -ics -icshost hostname [options]
          xboard -ncp [options]
          |pxboard
          cmail [options]

     DESCRIPTION
          XBoard is a graphical chessboard that can serve as a user interface to
          chess engines (such as GNU Chess), the Internet Chess Servers,
          electronic mail correspondence chess, or your own collection of saved
          games.

          This manual documents version 4.7.3 of XBoard.

     MAJOR MODES
          XBoard always runs in one of four major modes.  You select the major
          mode from the command line when you start up XBoard.

          xboard [options]
               As an interface to GNU Chess or another chess engine running on
               your machine, XBoard lets you play a game against the machine,
               set up arbitrary positions, force variations, watch a game
               between two chess engines, interactively analyze your stored
               games or set up and analyze arbitrary positions.  (Note: Not all
               chess engines support analysis.)

          xboard -ics -icshost hostname [options]
               As Internet Chess Server (ICS) interface, XBoard lets you play
               against other ICS users, observe games they are playing, or
               review games that have recently finished.  Most of the ICS "wild"
               chess variants are supported, including bughouse.

          xboard -ncp [options]
               XBoard can also be used simply as an electronic chessboard to
               play through games. It will read and write game files and allow
               you to play through variations manually. You can use it to browse
               games off the net or review games you have saved.  These features
               are also available in the other modes.

          |pxboard
               If you want to pipe games into XBoard, use the supplied shell
               script `pxboard'.  For example, from the news reader `xrn', find
               a message with one or more games in it, click the Save button,
               and type `|pxboard' as the file name.

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          cmail [options]
               As an interface to electronic mail correspondence chess, XBoard
               works with the cmail program. See CMail below for instructions.

     BASIC OPERATION
          To move a piece, you can drag it with the left mouse button, or you
          can click the left mouse button once on the piece, then once more on
          the destination square. In crazyhouse, bughouse or shogi you can drag
          and drop pieces to the board from the holdings squares displayed next
          to the board.

          Old behavior, where right-clicking a square brings up a menu where you
          can select what piece to drop on it can still be selected through the
          `Drop Menu' option.  Only in Edit Position mode right and middle
          clicking a square is still used to put a piece on it, and the piece to
          drop is selected by sweeping the mouse vertically with the button held
          down.

          The default function of the right mouse button in other modes is to
          display the position the chess program thinks it will end up in.
          While moving the mouse vertically with this button pressed XBoard will
          step through the principal variation to show how this position will be
          reached.  Lines of play displayed in the engine-output window, or PGN
          variations in the comment window can similarly be played out on the
          board, by right-clicking on them.  Only in Analysis mode, when you
          walk along a PV, releasing the mouse button will forward the game upto
          that point, like you entered all previous PV moves.  As the display of
          the PV in that case starts after the first move a simple right-click
          will play the move the engine indicates.

          In Analysis mode you can also make a move by grabbing the piece with a
          double-click of the left mouse button (or while keeping the Ctrl key
          pressed).  In this case the move you enter will not be played, but
          will be excluded from the analysis of the current position.  (Or
          included if it was already excluded; it is a toggle.) This only works
          for engines that support this feature.

          When connected to an ICS, it is possible to call up a graphical
          representation of players seeking a game in stead of the chess board,
          when the latter is not in use (i.e. when you are not playing or
          observing).  Left-clicking the display area will switch between this
          'seek graph' and the chess board.  Hovering the mouse pointer over a
          dot will show the details of the seek ad in the message field above
          the board.  Left-clicking the dot will challenge that player.  Right-
          clicking a dot will 'push it to the back', to reveal any dots that
          were hidden behind it.  Right-clicking off dots will refresh the
          graph.

          Most other XBoard commands are available from the menu bar. The most
          frequently used commands also have shortcut keys or on-screen buttons.
          These shortcut keystrokes are mostly non-printable characters.  Typing

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          a letter or digit while the board window has focus will bring up a
          type-in box with the typed letter already in it.  You can use that to
          type a move in siuations where it is your turn to enter a move, type a
          move number to call up the position after that move in the display,
          or, in Edit Position mode, type a FEN.  Some rarely used parameters
          can only be set through options on the command line used to invoke
          XBoard.

          XBoard uses a settings file, in which it can remember any changes to
          the settings that are made through menus or command-line options, so
          they will still apply when you restart XBoard for another session.
          The settings can be saved into this file automatically when XBoard
          exits, or on explicit request of the user.  The default name for the
          settings file is /etc/xboard/xboard.conf, but in a standard install
          this file is only used as a master settings file that determines the
          system-wide default settings, and defers reading and writing of user
          settings to a user-specific file like ~/.xboardrc in the user's home
          directory.

          When XBoard is iconized, its graphical icon is a white knight if it is
          White's turn to move, a black knight if it is Black's turn.

     MENUS, BUTTONS, AND KEYS
        File Menu
          New Game
               Resets XBoard and the chess engine to the beginning of a new
               chess game. The `Ctrl-N' key is a keyboard equivalent. In
               Internet Chess Server mode, clears the current state of XBoard,
               then resynchronizes with the ICS by sending a refresh command. If
               you want to stop playing, observing, or examining an ICS game,
               use an appropriate command from the Action menu, not `New Game'.
               See Action Menu.

          New Shuffle Game
               Similar to `New Game', but allows you to specify a particular
               initial position (according to a standardized numbering system)
               in chess variants which use randomized opening positions (e.g.
               Chess960).  You can also press the `Pick Fixed' button to let
               XBoard generate a random number for you.  The thus selected
               opening position will then persistently be chosen on any
               following New Game command until you use this menu to select
               another. Selecting position number -1 (or pushing the `Randomize'
               button) will produce a newly randomized position on any new game.
               Using this menu item in variants that normally do not shuffle
               their opening position does cause these variants to become
               shuffle variants until you use the `New Shuffle Game' menu to
               explicitly switch the randomization off, or select a new variant.

          New Variant
               Allows you to select a new chess variant in non-ICS mode. (In ICS

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               play, the ICS is responsible for deciding which variant will be
               played, and XBoard adapts automatically.)  The shifted `Alt+V'
               key is a keyboard equivalent. If you play with an engine, the
               engine must be able to play the selected variant, or the command
               will be ignored.  XBoard supports all major variants, such as
               xiangqi, shogi, chess, chess960, Capablanca Chess, shatranj,
               crazyhouse, bughouse.  But not every board size has built-in
               bitmaps for un-orthodox pieces!  Only sizes bulky (72) and
               middling (49) have all pieces, while size petite (33) has most.
               These sizes would have to be set at startup through the `size'
               command-line option when you start up XBoard for such variants to
               be playable.

               You can overrule the default board format of the selected
               variant, (e.g. to play suicide chess on a 6 x 6 board), in this
               dialog, but normally you would not do that, and leave them at '-
               1', which means 'default'.

          Load Game
               Plays a game from a record file. The `Ctrl-O' key is a keyboard
               equivalent.  A pop-up dialog prompts you for the file name. If
               the file contains more than one game, a second pop-up dialog
               displays a list of games (with information drawn from their PGN
               tags, if any), and you can select the one you want.
               Alternatively, you can load the Nth game in the file directly, by
               typing the number `N' after the file name, separated by a space.

               The game file parser will accept PGN (portable game notation), or
               in fact almost any file that contains moves in algebraic
               notation. Notation of the form `P@f7' is accepted for piece-drops
               in bughouse games; this is a nonstandard extension to PGN.  If
               the file includes a PGN position (FEN tag), or an old-style
               XBoard position diagram bracketed by `[--' and `--]' before the
               first move, the game starts from that position. Text enclosed in
               parentheses, square brackets, or curly braces is assumed to be
               commentary and is displayed in a pop-up window. Any other text in
               the file is ignored. PGN variations (enclosed in parentheses)
               also are treated as comments; however, if you rights-click them
               in the comment window, XBoard will shelve the current line, and
               load the the selected variation, so you can step through it.  You
               can later revert to the previous line with the `Revert' command.
               This way you can walk quite complex varation trees with XBoard.
               The nonstandard PGN tag [Variant "varname"] functions similarly
               to the -variant command-line option (see below), allowing games
               in certain chess variants to be loaded. Note that it must appear
               before any FEN tag for XBoard to recognize variant FENs
               appropriately.  There is also a heuristic to recognize chess
               variants from the Event tag, by looking for the strings that the
               Internet Chess Servers put there when saving variant ("wild")
               games.

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          Load Position
               Sets up a position from a position file.  A pop-up dialog prompts
               you for the file name.  The shifted `Ctrl-O' key is a keyboard
               equivalent. If the file contains more than one saved position,
               and you want to load the Nth one, type the number N after the
               file name, separated by a space. Position files must be in FEN
               (Forsythe-Edwards notation), or in the format that the Save
               Position command writes when oldSaveStyle is turned on.

          Load Next Position
               Loads the next position from the last position file you loaded.
               The shifted `PgDn' key is a keyboard equivalent.

          Load Previous Position
               Loads the previous position from the last position file you
               loaded. The shifted `PgUp' key is a keyboard equivalent.  Not
               available if the last position was loaded from a pipe.

          Save Game
               Appends a record of the current game to a file.  The `Ctrl-S' key
               is a keyboard equivalent.  A pop-up dialog prompts you for the
               file name. If the game did not begin with the standard starting
               position, the game file includes the starting position used.
               Games are saved in the PGN (portable game notation) format,
               unless the oldSaveStyle option is true, in which case they are
               saved in an older format that is specific to XBoard. Both formats
               are human-readable, and both can be read back by the `Load Game'
               command.  Notation of the form `P@f7' is accepted for piece-drops
               in bughouse games; this is a nonstandard extension to PGN.

          Save Position
               Appends a diagram of the current position to a file.  The shifted
               `Ctrl+S' key is a keyboard equivalent. A pop-up dialog prompts
               you for the file name. Positions are saved in FEN (Forsythe-
               Edwards notation) format unless the `oldSaveStyle' option is
               true, in which case they are saved in an older, human-readable
               format that is specific to XBoard. Both formats can be read back
               by the `Load Position' command.

          Save Games as Book
               Creates an opening book from the currently loaded game file.  The
               book will be saved on the file specified in the `Common Engine'
               options dialog.  The value of `Book Depth' specified in that same
               dialog will be used to determine how many moves of each game will
               be added to the internal book buffer.  This command can take a
               long time to process, and the size of the buffer is currently
               limited.  At the end the buffer will be saved as a Polyglot book,
               but the buffer will ot be cleared, so that you can continue
               adding games from other game files.

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          Mail Move
          Reload CMail Message
               See CMail.

          Exit Exits from XBoard. The `Ctrl-Q' key is a keyboard equivalent.

        Edit Menu
          Copy Game
               Copies a record of the current game to an internal clipboard in
               PGN format and sets the X selection to the game text. The `Ctrl-
               C' key is a keyboard equivalent. The game can be pasted to
               another application (such as a text editor or another copy of
               XBoard) using that application's paste command.  In many X
               applications, such as xterm and emacs, the middle mouse button
               can be used for pasting; in XBoard, you must use the Paste Game
               command.

          Copy Position
               Copies the current position to an internal clipboard in FEN
               format and sets the X selection to the position text. The shifted
               `Ctrl-C' key is a keyboard equivalent.  The position can be
               pasted to another application (such as a text editor or another
               copy of XBoard) using that application's paste command.  In many
               X applications, such as xterm and emacs, the middle mouse button
               can be used for pasting; in XBoard, you must use the Paste
               Position command.

          Copy Game List
               Copies the current game list to the clipboard, and sets the X
               selection to this text.  A format of comma-separated double-
               quoted strings is used, including all tags, so it can be easily
               imported into spread-sheet programs.

          Paste Game
               Interprets the current X selection as a game record and loads it,
               as with Load Game. The `Ctrl-V' key is a keyboard equivalent.

          Paste Position
               Interprets the current X selection as a FEN position and loads
               it, as with Load Position. The shifted `Ctrl-V' key is a keyboard
               equivalent.

          Edit Game
               Allows you to make moves for both Black and White, and to change
               moves after backing up with the `Backward' command. The clocks do
               not run. The `Ctrl-E' key is a keyboard equivalent.

               In chess engine mode, the chess engine continues to check moves
               for legality but does not participate in the game. You can bring
               the chess engine into the game by selecting `Machine White',
               `Machine Black', or `Two Machines'.

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               In ICS mode, the moves are not sent to the ICS: `Edit Game' takes
               XBoard out of ICS Client mode and lets you edit games locally.
               If you want to edit games on ICS in a way that other ICS users
               can see, use the ICS `examine' command or start an ICS match
               against yourself.

          Edit Position
               Lets you set up an arbitrary board position.  The shifted `Ctrl-
               E' key is a keyboard equivalent.  Use mouse button 1 to drag
               pieces to new squares, or to delete a piece by dragging it off
               the board or dragging an empty square on top of it.  To drop a
               new piece on a square, press mouse button 2 or 3 over the square.
               This puts a white or black pawn in the square, respectively, but
               you can change that to any other piece type by dragging the mouse
               down before you release the button.  You will then see the piece
               on the originally clicked square cycle through the available
               pieces (including those of opposite color), and can release the
               button when you see the piece you want.  To alter the side to
               move, you can click the clock (the words White and Black above
               the board) of the side you want to give the move to.  To clear
               the board you can click the clock of the side that alread has the
               move (which is highlighted in black).  The old behavior with a
               piece menu can still be configured with the aid of the
               `pieceMenu' option.  Selecting `Edit Position' causes XBoard to
               discard all remembered moves in the current game.

               In ICS mode, changes made to the position by `Edit Position' are
               not sent to the ICS: `Edit Position' takes XBoard out of `ICS
               Client' mode and lets you edit positions locally. If you want to
               edit positions on ICS in a way that other ICS users can see, use
               the ICS `examine' command, or start an ICS match against
               yourself.  (See also the ICS Client topic above.)

          Edit Tags
               Lets you edit the PGN (portable game notation) tags for the
               current game. After editing, the tags must still conform to the
               PGN tag syntax:

                   <tag-section> ::= <tag-pair> <tag-section>
                                           <empty>
                   <tag-pair> ::= [ <tag-name> <tag-value> ]
                   <tag-name> ::= <identifier>
                   <tag-value> ::= <string>

               See the PGN Standard for full details. Here is an example:

                   [Event "Portoroz Interzonal"]
                   [Site "Portoroz, Yugoslavia"]
                   [Date "1958.08.16"]
                   [Round "8"]
                   [White "Robert J. Fischer"]

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                   [Black "Bent Larsen"]
                   [Result "1-0"]

               Any characters that do not match this syntax are silently
               ignored. Note that the PGN standard requires all games to have at
               least the seven tags shown above. Any that you omit will be
               filled in by XBoard with `?' (unknown value), or `-'
               (inapplicable value).

          Edit Comment
               Adds or modifies a comment on the current position. Comments are
               saved by `Save Game' and are displayed by `Load Game', PGN
               variations will also be printed in this window, and can be
               promoted to main line by right-clicking them.  `Forward', and
               `Backward'.

          Edit Book
               Pops up a window listing the moves available in the GUI book
               (specified in the `Common Engine Settings' dialog) from the
               currently displayed position, together with their weights and
               (optionally in braces) learn info. You can then edit this list,
               and the new list will be stored back into the book when you press
               OK.  Note that the listed percentages are neither used, nor
               updated when you change the weights; they are just there as an
               optical aid.

          Revert
          Annotate
               If you are examining an ICS game and Pause mode is off, Revert
               issues the ICS command `revert'.  In local mode, when you were
               editing or analyzing a game, and the `-variations' command-line
               option is switched on, you can start a new variation by holding
               the Shift key down while entering a move not at the end of the
               game.  Variations can also become the currently displayed line by
               clicking a PGN variation displayed in the Comment window.  This
               can be applied recursively, so that you can analyze variations on
               variations; each time you create a new variation by entering an
               alternative move with Shift pressed, or select a new one from the
               Comment window, the current variation will be shelved. `Revert'
               allows you to return to the most recently shelved variation.  The
               difference between `Revert' and `Annotate' is that with the
               latter, the variation you are now abandoning will be added as a
               comment (in PGN variation syntax, i.e. between parentheses) to
               the original move where you deviated, for later recalling.  The
               `Home' key is a keyboard equivalent to `Revert'.

          Truncate Game
               Discards all remembered moves of the game beyond the current
               position. Puts XBoard into `Edit Game' mode if it was not there
               already.  The `End' key is a keyboard equivalent.

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          Backward
               Steps backward through a series of remembered moves.  The `[<]'
               button and the `Alt+LeftArrow' key are equivalents, as is turning
               the mouse wheel towards you.  In addition, pressing the Control
               key steps back one move, and releasing it steps forward again.

               In most modes, `Backward' only lets you look back at old
               positions; it does not retract moves. This is the case if you are
               playing against a chess engine, playing or observing a game on an
               ICS, or loading a game.  If you select `Backward' in any of these
               situations, you will not be allowed to make a different move. Use
               `Retract Move' or `Edit Game' if you want to change past moves.

               If you are examining an ICS game, the behavior of `Backward'
               depends on whether XBoard is in Pause mode. If Pause mode is off,
               `Backward' issues the ICS backward command, which backs up
               everyone's view of the game and allows you to make a different
               move. If Pause mode is on, `Backward' only backs up your local
               view.

          Forward
               Steps forward through a series of remembered moves (undoing the
               effect of `Backward') or forward through a game file. The `[>]'
               button and the `Alt+RightArrow' key are equivalents, as is
               turning the mouse wheel away from you.

               If you are examining an ICS game, the behavior of Forward depends
               on whether XBoard is in Pause mode. If Pause mode is off,
               `Forward' issues the ICS forward command, which moves everyone's
               view of the game forward along the current line. If Pause mode is
               on, `Forward' only moves your local view forward, and it will not
               go past the position that the game was in when you paused.

          Back to Start
               Jumps backward to the first remembered position in the game.  The
               `[<<]' button and the `Alt+Home' key are equivalents.

               In most modes, Back to Start only lets you look back at old
               positions; it does not retract moves. This is the case if you are
               playing against a local chess engine, playing or observing a game
               on a chess server, or loading a game. If you select `Back to
               Start' in any of these situations, you will not be allowed to
               make different moves. Use `Retract Move' or `Edit Game' if you
               want to change past moves; or use Reset to start a new game.

               If you are examining an ICS game, the behavior of @samp{Back to
               Start} depends on whether XBoard is in Pause mode. If Pause mode
               is off, `Back to Start' issues the ICS `backward 999999' command,
               which backs up everyone's view of the game to the start and
               allows you to make different moves. If Pause mode is on,
               @samp{Back to Start} only backs up your local view.

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          Forward to End
               Jumps forward to the last remembered position in the game. The
               `[>>]' button and the `Alt+End' key are equivalents.

               If you are examining an ICS game, the behavior of @samp{Forward
               to End} depends on whether XBoard is in Pause mode. If Pause mode
               is off, `Forward to End' issues the ICS `forward 999999' command,
               which moves everyone's view of the game forward to the end of the
               current line. If Pause mode is on, `Forward to End' only moves
               your local view forward, and it will not go past the position
               that the game was in when you paused.

        View Menu
          Flip View
               Inverts your view of the chess board for the duration of the
               current game. Starting a new game returns the board to normal.
               The `F2' key is a keyboard equivalent.

          Show Engine Output
               Shows or hides a window in which the thinking output of any
               loaded engines is displayed. The shifted `Alt+O' key is a
               keyboard equivalent.  XBoard will display lines of thinking
               output of the same depth ordered by score, (highest score on
               top), rather than in the order the engine produced them. Usually
               this amounts to the same, as a normal engine search will only
               find new PV (and emit it as thinking output) when it searches a
               move with a higher score than the previous variation. But when
               the engine is in multi-variation mode this needs not always be
               true, and it is more convenient for someone analyzing games to
               see the moves sorted by score. The order in which the engine
               found them is only of interest to the engine author, and can
               still be deduced from the time or node count printed with the
               line.  Right-clicking a line in this window, and then moving the
               mouse vertically with the right button kept down, will make
               XBoard play through the PV listed there.  The use of the board
               window as 'variation board' will normally end when you release
               the right button, or when the opponent plays a move.  But beware:
               in Analysis mode, moves thus played out will be added to the
               game.  The Engine-Output pane for each engine will contain a
               header displaying the multi-PV status and a list of excluded
               moves in Analysis mode, which are also responsive to right-
               clicking.

          Show Move History
               Shows or hides a list of moves of the current game.  The shifted
               `Alt+H' key is a keyboard equivalent.  This list allows you to
               move the display to any earlier position in the game by clicking
               on the corresponding move.

          Show Evaluation Graph
               Shows or hides a window which displays a graph of how the engine

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               score(s) evolved as a function of the move number. The shifted
               `Alt+E' key is a keyboard equivalent.  Clicking on the graph will
               bring the corresponding position in the board display.

          Show Game List
               Shows or hides the list of games generated by the last `Load
               Game' command. The shifted `Alt+G' key is a keyboard equivalent.

          Tags Pops up a window which shows the PGN (portable game notation)
               tags for the current game. For now this is a duplicate of the
               `Edit Tags' item in the `Edit' menu.

          Comments
               Pops up a window which shows any comments to or variations on the
               current move.  For now this is a duplicate of the `Edit Comment'
               item in the `Edit' menu.

          ICS Input Box
               If this option is set in ICS mode, XBoard creates an extra window
               that you can use for typing in ICS commands.  The input box is
               especially useful if you want to type in something long or do
               some editing on your input, because output from ICS doesn't get
               mixed in with your typing as it would in the main terminal
               window.

          Open Chat Window
               This menu item opens a window in which you can conduct upto 5
               chats with other ICS users (or channels).  To use the window,
               write the name of your chat partner, the channel number, or the
               words 'shouts', 'whispers', 'cshouts' in the upper field (closing
               with <Enter>).  Everything you type in the lowest field will then
               automatically be sent to the mentioned party, while everything
               that party sends to you will appear in the central text box,
               rather than appear in the ICS console.  The row of buttons allow
               you to choose between chat; to start a new chat, just select an
               empty button, and complete the `Chat partner' field.

          Board
               Summons a dialog where you can customize the look of the chess
               board.  Here you can specify the directory from which piece
               images should be taken, when you don't want to use the built-in
               piece images (see `pieceImageDirectory' option), external images
               to be used for the board squares (`liteBackTextureFile' and
               `darkBackTextureFile' options), and square and piece colors for
               the default pieces.

          Game List Tags
               a duplicate of the Game List dialog in the Options menu.

        Mode Menu

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          Machine White
               Tells the chess engine to play White. The `Ctrl-W' key is a
               keyboard equivalent.

          Machine Black
               Tells the chess engine to play Black.  The `Ctrl-B' key is a
               keyboard equivalent.

          Two Machines
               Plays a game between two chess engines.  The `Ctrl-T' key is a
               keyboard equivalent.

          Analysis Mode
               XBoard tells the chess engine to start analyzing the current
               game/position and shows you the analysis as you move pieces
               around.  The `Ctrl-A' key is a keyboard equivalent.  Note: Some
               chess engines do not support Analysis mode.

               To set up a position to analyze, you do the following:

               1. Select Edit Position from the Mode Menu

               2. Set up the position.  Use the middle and right buttons to
               bring up the white and black piece menus.

               3. When you are finished, click on either the Black or White
               clock to tell XBoard which side moves first.

               4. Select Analysis Mode from the Mode Menu to start the analysis.

               You can now play legal moves to create follow-up positions for
               the engine to analyze, while the moves will be remembered as a
               stored game, and then step backward through this game to take the
               moves back.  Note that you can also click on the clocks to set
               the opposite side to move (adding a so-called `null move' to the
               game).

               You can also tell the engine to exclude some moves from analysis.
               (Engines that do not support the exclude-moves feature will
               ignore this, however.) The general way to do this is to play the
               move you want to exclude starting with a double click on the
               piece.  When you use drag-drop moving, the piece you grab with a
               double click will also remain on its square, to show you that you
               are not really making the move, but just forbid it from the
               current position.  Playing a thus excluded move a second time
               will include it again.  Excluded moves will be listed as text in
               a header line in the Engine Output window, and you can also re-
               include them by right-clicking them there.  This header line will
               also contain the words 'best' and 'tail'; right-clicking those
               will exclude the currently best move, or all moves not explicitly
               listed in the header line.  Once you leave the current position

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               all memory of excluded moves will be lost when you return there.

               Selecting this menu item while already in `Analysis Mode' will
               toggle the participation of the second engine in the analysis.
               The output of this engine will then be shown in the lower pane of
               the Engine Output window.  The analysis function can also be used
               when observing games on an ICS with an engine loaded (zippy
               mode); the engine then will analyse the positions as they occur
               in the observed game.

          Analyze Game
               This option subjects the currently loaded game to automatic
               analysis by the loaded engine.  The `Ctrl-G' key is a keyboard
               equivalent.  XBoard will start auto-playing the game from the
               currently displayed position, while the engine is analyzing the
               current position.  The game will be annotated with the results of
               these analyses.  In particlar, the score and depth will be added
               as a comment, and the PV will be added as a variation.

               Normally the analysis would stop after reaching the end of the
               game.  But when a game is loaded from a multi-game file while
               `Analyze Game' was already switched on, the analysis will
               continue with the next game in the file until the end of the file
               is reached (or you switch to another mode).

               The time the engine spends on analyzing each move can be
               controlled through the command-line option `-timeDelay', which
               can also be set from the `Load Game Options' menu dialog.  Note:
               Some chess engines do not support Analysis mode.

          Edit Game
               Duplicate of the item in the Edit menu.  Note that `Edit Game' is
               the idle mode of XBoard, and can be used to get you out of other
               modes. E.g. to stop analyzing, stop a game between two engines or
               stop editing a position.

          Edit Position
               Duplicate of the item in the Edit menu.

          Training
               Training mode lets you interactively guess the moves of a game
               for one of the players. You guess the next move of the game by
               playing the move on the board. If the move played matches the
               next move of the game, the move is accepted and the opponent's
               response is auto-played.  If the move played is incorrect, an
               error message is displayed.  You can select this mode only while
               loading a game (that is, after selecting `Load Game' from the
               File menu).  While XBoard is in `Training' mode, the navigation
               buttons are disabled.

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          ICS Client
               This is the normal mode when XBoard is connected to a chess
               server.  If you have moved into Edit Game or Edit Position mode,
               you can select this option to get out.

               To use xboard in ICS mode, run it in the foreground with the -ics
               option, and use the terminal you started it from to type commands
               and receive text responses from the chess server.  See Chess
               Servers below for more information.

               XBoard activates some special position/game editing features when
               you use the `examine' or `bsetup' commands on ICS and you have
               `ICS Client' selected on the Mode menu.  First, you can issue the
               ICS position-editing commands with the mouse.  Move pieces by
               dragging with mouse button 1.  To drop a new piece on a square,
               press mouse button 2 or 3 over the square.  This brings up a menu
               of white pieces (button 2) or black pieces (button 3).
               Additional menu choices let you empty the square or clear the
               board.  Click on the White or Black clock to set the side to
               play.  You cannot set the side to play or drag pieces to
               arbitrary squares while examining on ICC, but you can do so in
               `bsetup' mode on FICS.  In addition, the menu commands `Forward',
               `Backward', `Pause', and `Stop Examining' have special functions
               in this mode; see below.

          Machine Match
               Starts a match between two chess programs, with a number of games
               and other parameters set through the `Match Options' menu dialog.
               When a match is already running, selecting this item will make
               XBoard drop out of match mode after the current game finishes.

          Pause
               Pauses updates to the board, and if you are playing against a
               chess engine, also pauses your clock. To continue, select `Pause'
               again, and the display will automatically update to the latest
               position.  The `P' button and keyboard `Pause' key are
               equivalents.

               If you select Pause when you are playing against a chess engine
               and it is not your move, the chess engine's clock will continue
               to run and it will eventually make a move, at which point both
               clocks will stop. Since board updates are paused, however, you
               will not see the move until you exit from Pause mode (or select
               Forward).  This behavior is meant to simulate adjournment with a
               sealed move.

               If you select Pause while you are observing or examining a game
               on a chess server, you can step backward and forward in the
               current history of the examined game without affecting the other
               observers and examiners, and without having your display jump
               forward to the latest position each time a move is made. Select

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               Pause again to reconnect yourself to the current state of the
               game on ICS.

               If you select `Pause' while you are loading a game, the game
               stops loading. You can load more moves manually by selecting
               `Forward', or resume automatic loading by selecting `Pause'
               again.

        Action Menu
          Accept
               Accepts a pending match offer. The `F3' key is a keyboard
               equivalent.  If there is more than one offer pending, you will
               have to type in a more specific command instead of using this
               menu choice.

          Decline
               Declines a pending offer (match, draw, adjourn, etc.).  The `F4'
               key is a keyboard equivalent. If there is more than one offer
               pending, you will have to type in a more specific command instead
               of using this menu choice.

          Call Flag
               Calls your opponent's flag, claiming a win on time, or claiming a
               draw if you are both out of time. The `F5' key is a keyboard
               equivalent.  You can also call your opponent's flag by clicking
               on his clock.

          Draw Offers a draw to your opponent, accepts a pending draw offer from
               your opponent, or claims a draw by repetition or the 50-move
               rule, as appropriate. The `F6' key is a keyboard equivalent.

          Adjourn
               Asks your opponent to agree to adjourning the current game, or
               agrees to a pending adjournment offer from your opponent.  The
               `F7' key is a keyboard equivalent.

          Abort
               Asks your opponent to agree to aborting the current game, or
               agrees to a pending abort offer from your opponent.  The `F8' key
               is a keyboard equivalent. An aborted game ends immediately
               without affecting either player's rating.

          Resign
               Resigns the game to your opponent. The `F9' key is a keyboard
               equivalent.

          Stop Observing
               Ends your participation in observing a game, by issuing the ICS
               observe command with no arguments. ICS mode only.  The `F10' key
               is a keyboard equivalent.

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          Stop Examining
               Ends your participation in examining a game, by issuing the ICS
               unexamine command. ICS mode only.  The `F11' key is a keyboard
               equivalent.

          Upload to Examine
               Create an examined game of the proper variant on the ICS, and
               send the game there that is currenty loaded in XBoard (e.g.
               through pasting or loading from file).  You must be connected to
               an ICS for this to work.

          Adjudicate to White
          Adjudicate to Black
          Adjudicate Draw
               Terminate an ongoing game in Two-Machines mode (including match
               mode), with as result a win for white, for black, or a draw,
               respectively.  The PGN file of the game will accompany the result
               string by the comment "user adjudication".

        Engine Menu
          Load Engine
               Pops up a dialog where you can select or specify an engine to be
               loaded.  You will always have to indicate whether you want to
               load the engine as first or second engine, through the Load
               menitioned engine as drop-down list at the bottom of the
               dialog. You can even replace engines during a game, without
               disturbing that game.  (Beware that after loading an engine,
               XBoard will always be in Edit Game mode, so you will have to tell
               the new engine what to do before it does anything!) When you
               select an already installed engine from the Select Engine from
               List drop-down list, all other fields of the dialog will be
               ignored. In other cases, you have to specify the engine
               executable, possible arguments on the engine command line (if the
               engine docs say the engine needs any), and the directory where
               the engine should look for its files (if this cannot be deduced
               automatically from the specification of the engine executable).
               You will also have to specify (with the aid of checkboxes) if the
               engine is UCI. If Add this engine to the list is ticked
               (which it is by default), the engine will be added to the list of
               installed engines in your settings file, (provided you save the
               settings!), so that next time you can select it from the drop-
               down list. You can also specify a nickname, under which the
               engine will then appear in that drop-down list, and even choose
               to use that nickname for it in PGN files for engine-engine games.
               The info you supply with the checkboxes whether the engine should
               use GUI book, or (for variant engines) automatically switch to
               the current variant when loaded, will also be included in the
               list. For obsolete XBoard engines, which would normally take a
               long delay to load because XBoard is waiting for a response they
               will not give, you can tick WB protocol v1 to speed up the
               loading process.

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          Engine #N Settings
               Pop up a menu dialog to alter the settings specific to the
               applicable engine.  (The second engine is only accessible once it
               has been used in Two-Machines mode.) For each parameter the
               engine allows to be set, a control element will appear in this
               dialog that can be used to alter the value.  Depending on the
               type of parameter (text string, number, multiple choice, on/off
               switch, instantaneous signal) the appropriate control will
               appear, with a description next to it.  XBoard has no idea what
               these values mean; it just passes them on to the engine.  How
               this dialog looks is completely determined by the engine, and
               XBoard just passes it on to the user.  Many engines do not have
               any parameters that can be set by the user, and in that case the
               dialog will be empty (except for the OK and cancel buttons).  UCI
               engines usually have many parameters. (But these are only visible
               with a sufficiently modern version of the Polyglot adapter needed
               to run UCI engines, e.g. Polyglot 1.4.55b.) For native XBoard
               engines this is less common.

          Hint Displays a move hint from the chess engine.

          Book Displays a list of possible moves from the chess engine's opening
               book.  The exact format depends on what chess engine you are
               using.  With GNU Chess 4, the first column gives moves, the
               second column gives one possible response for each move, and the
               third column shows the number of lines in the book that include
               the move from the first column. If you select this option and
               nothing happens, the chess engine is out of its book or does not
               support this feature.

          Move Now
               Forces the chess engine to move immediately. Chess engine mode
               only.  The `Ctrl-M' key is a keyboard equivalent.

          Retract Move
               Retracts your last move. In chess engine mode, you can do this
               only after the chess engine has replied to your move; if the
               chess engine is still thinking, use `Move Now' first. In ICS
               mode, `Retract Move' issues the command `takeback 1' or `takeback
               2' depending on whether it is your opponent's move or yours.  The
               `Ctrl-X' key is a keyboard equivalent.

          Recently Used Engines
               At the bottom of the engine menu there can be a list of names of
               engines that you recently loaded through the Load Engine menu
               dialog in previous sessions.  Clicking on such a name will load
               that engine as first engine, so you won't have to search for it
               in your list of installed engines, if that is very long.  The
               maximum number of displayed engine names is set by the
               `recentEngines'command-line option.

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        Options Menu
          The following items to set option values appear in the dialog summoned
          by the general Options menu item.

          Absolute Analysis Scores
               Controls if scores on the Engine Output window during analysis
               will be printed from the white or the side-to-move point-of-view.

          Almost Always Queen
               If this option is on, 7th-rank pawns automatically change into
               Queens when you pick them up, and when you drag them to the
               promotion square and release them there, they will promote to
               that.  But when you drag such a pawn backwards first, its
               identity will start to cycle through the other available pieces.
               This will continue until you start to move it forward; at which
               point the identity of the piece will be fixed, so that you can
               safely put it down on the promotion square.  If this option is
               off, what happens depends on the option `alwaysPromoteToQueen',
               which would force promotion to Queen when true.  Otherwise XBoard
               would bring up a dialog box whenever you move a pawn to the last
               rank, asking what piece you want to promote to.

          Animate Dragging
               If Animate Dragging is on, while you are dragging a piece with
               the mouse, an image of the piece follows the mouse cursor.  If
               Animate Dragging is off, there is no visual feedback while you
               are dragging a piece, but if Animate Moving is on, the move will
               be animated when it is complete.

          Animate Moving
               If Animate Moving is on, all piece moves are animated.  An image
               of the piece is shown moving from the old square to the new
               square when the move is completed (unless the move was already
               animated by Animate Dragging).  If Animate Moving is off, a moved
               piece instantly disappears from its old square and reappears on
               its new square when the move is complete.  The shifted `Ctrl-A'
               key is a keyboard equivalent.

          Auto Flag
               If this option is on and one player runs out of time before the
               other, XBoard will automatically call his flag, claiming a win on
               time.  The shifted `Ctrl-F' key is a keyboard equivalent.  In ICS
               mode, Auto Flag will only call your opponent's flag, not yours,
               and the ICS may award you a draw instead of a win if you have
               insufficient mating material.  In local chess engine mode, XBoard
               may call either player's flag and will not take material into
               account (?).

          Auto Flip View
               If the Auto Flip View option is on when you start a game, the
               board will be automatically oriented so that your pawns move from

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               the bottom of the window towards the top.

               If you are playing a game on an ICS, the board is always oriented
               at the start of the game so that your pawns move from the bottom
               of the window towards the top. Otherwise, the starting
               orientation is determined by the `flipView' command line option;
               if it is false (the default), White's pawns move from bottom to
               top at the start of each game; if it is true, Black's pawns move
               from bottom to top. See User interface options.

          Blindfold
               If this option is on, XBoard displays the board as usual but does
               not display pieces or move highlights.  You can still move in the
               usual way (with the mouse or by typing moves in ICS mode), even
               though the pieces are invisible.

          Drop Menu
               Controls if right-clicking the board in crazyhouse / bughouse
               will pop up a menu to drop a piece on the clicked square (old,
               deprecated behavior) or allow you to step through an engine PV
               (new, recommended behavior).

          Enable Variation Trees
               If this option is on, playing a move in Edit Game or Analyze mode
               while keeping the Shift key pressed will start a new variation.
               You can then recall the previous line through the `Revert' menu
               item.  When off, playing a move will truncate the game and append
               the move irreversibly.

          Hide Thinking
               If this option is off, the chess engine's notion of the score and
               best line of play from the current position is displayed as it is
               thinking. The score indicates how many pawns ahead (or if
               negative, behind) the chess engine thinks it is. In matches
               between two machines, the score is prefixed by `W' or `B' to
               indicate whether it is showing White's thinking or Black's, and
               only the thinking of the engine that is on move is shown.  The
               shifted `Ctrl-H' key is a keyboard equivalent.

          Highlight Last Move
               If Highlight Last Move is on, after a move is made, the starting
               and ending squares remain highlighted. In addition, after you use
               Backward or Back to Start, the starting and ending squares of the
               last move to be unmade are highlighted.

          Highlight with Arrow
               Causes the highlighting described in Highlight Last Move to be
               done by drawing an arrow between the highlighted squares, so that
               it is visible even when the width of the grid lines is set to
               zero.

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          Move Sound
               Enables the sounding of an audible signal when the computer
               performs a move.  For the selection of the sound, see `Sound
               Options'.  If you turn on this option when using XBoard with the
               Internet Chess Server, you will probably want to give the `set
               bell 0' command to the ICS, since otherwise the ICS will ring the
               terminal bell after every move (not just yours). (The `.icsrc'
               file is a good place for this; see ICS options.)

          One-Click Moving
               If this option is on, XBoard does not wait for you to click both
               the from- and the to-square, or drag the piece, but performs a
               move as soon as it is uniqely specified.  This applies to
               clicking an own piece that only has a single legal move, clicking
               an empty square or opponent piece where only one of your pieces
               can move (or capture) to.  Furthermore, a double-click on a piece
               that can only make a single capture will cause that capture to be
               made.  Promoting a Pawn by clicking its to-square will suppress
               the promotion popup or other methods for selecting an under-
               promotion, and make it promote to Queen.

          Periodic Updates
               If this option is off (or if you are using a chess engine that
               does not support periodic updates), the analysis window will only
               be updated when the analysis changes. If this option is on, the
               Analysis Window will be updated every two seconds.

          Play Move(s) of Clicked PV
               If this option is on, right-clicking a PV in the Engine Output
               window during Analyze mode will cause the first move of that PV
               to be played.  You could also play more than one (or no) PV move
               by moving the mouse to engage in the PV walk such a right-click
               will start, to seek out another position along the PV where you
               want to continue the analysis, before releasing the mouse button.

          Ponder Next Move
               If this option is off, the chess engine will think only when it
               is on move.  If the option is on, the engine will also think
               while waiting for you to make your move.  The shifted `Ctrl-P'
               key is a keyboard equivalent.

          Popup Exit Message
               If this option is on, when XBoard wants to display a message just
               before exiting, it brings up a modal dialog box and waits for you
               to click OK before exiting.  If the option is off, XBoard prints
               the message to standard error (the terminal) and exits
               immediately.

          Popup Move Errors
               If this option is off, when you make an error in moving (such as
               attempting an illegal move or moving the wrong color piece), the

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               error message is displayed in the message area.  If the option is
               on, move errors are displayed in small pop-up windows like other
               errors.  You can dismiss an error pop-up either by clicking its
               OK button or by clicking anywhere on the board, including down-
               clicking to start a move.

          Scores in Move List
               If this option is on, XBoard will display the depth and score of
               engine moves in the Move List, in the format of a PGN comment.

          Show Coords
               If this option is on, XBoard displays algebraic coordinates along
               the board's left and bottom edges.

          Show Target Squares
               If this option is on, all squares a piece that is 'picked up'
               with the mouse can legally move to are highighted with a fat
               colored dot in the highlightColor (non-captures) or
               premoveHighlightColor (captures).  Legality testing must be on
               for XBoard to know how the piece moves.

          Test Legality
               If this option is on, XBoard tests whether the moves you try to
               make with the mouse are legal and refuses to let you make an
               illegal move.  The shifted `Ctrl-L' key is a keyboard equivalent.
               Moves loaded from a file with `Load Game' are also checked.  If
               the option is off, all moves are accepted, but if a local chess
               engine or the ICS is active, they will still reject illegal
               moves.  Turning off this option is useful if you are playing a
               chess variant with rules that XBoard does not understand.
               (Bughouse, suicide, and wild variants where the king may castle
               after starting on the d file are generally supported with Test
               Legality on.)

          Flash Moves
          Flash Rate
               If this option is non-zero, whenever a move is completed, the
               moved piece flashes the specified number of times.  The flash-
               rate setting determines how rapidly this flashing occurs.

          Animation Speed
               Determines the duration (in msec) of an animation step, when
               `Animate Moving' is swiched on.

          Zoom factor in Evaluation Graph
               Sets the valueof the `evalZoom' option, indicating the factor by
               which the score interval (-1,1) should be blown up on the
               vertical axis of the Evaluation Graph.

          Pops up a sub-menu where you can set the time-control parameters
          interactively.  Allows you to select classical or incremental time

                                       - 21 -        Formatted:  January 7, 2014

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          controls, set the moves per session, session duration, and time
          increment.  Also allows specification of time-odds factors for one or
          both engines.  If an engine is given a time-odds factor N, all time
          quota it gets, be it at the beginning of a session or through the time
          increment or fixed time per move, will be divided by N.  The shifted
          `Alt+T' key is a keyboard equivalent.

          Pops up a sub-menu where you can set some engine parameters common to
          most engines, such as hash-table size, tablebase cache size, maximum
          number of processors that SMP engines can use, and where to find the
          Polyglot adapter needed to run UCI engines under XBoard. The feature
          that allows setting of these parameters on engines is new since XBoard
          4.3.15, so not many XBoard/WinBoard engines respond to it yet, but UCI
          engines should.

          It is also possible to specify a GUI opening book here, i.e. an
          opening book that XBoard consults for any position a playing engine
          gets in.  It then forces the engine to play the book move, rather than
          to think up its own, if that position is found in the book.  The book
          can switched on and off independently for either engine.  The way book
          moves are chosen can be influenced through the settings of book depth
          and variety.  After both sides have played more moves than the
          specified depth, the book will no longer be consulted.  When the
          variety is set to 50, moves will be played with the probability
          specified in the book.  When set to 0, only the move(s) with the
          highest probability will be played.  When set to 100, all listed moves
          will be played with equal pobability.  Other settings interpolate
          between that.  The shifted `Alt+U' key is a keyboard equivalent.

          Pops up a sub-menu where you can enable or disable various
          adjudications that XBoard can perform in engine-engine games.  The
          shifted `Alt+J' key is a keyboard equivalent.  You can instruct XBoard
          to detect and terminate the game on checkmate or stalemate, even if
          the engines would not do so, to verify engine result claims
          (forfeiting engines that make false claims), rather than naively
          following the engine, to declare draw on positions which can never be
          won for lack of mating material, (e.g. KBK), or which are impossible
          to win unless the opponent seeks its own demise (e.g. KBKN).  For
          these adjudications to work, `Test Legality' should be switched on.
          It is also possible to instruct XBoard to enforce a 50-move or 3-
          fold-repeat rule and automatically declare draw (after a user-
          adjustable number of moves or repeats) even if the engines are
          prepared to go on.  It is also possible to have XBoard declare draw on
          games that seem to drag on forever, or adjudicate a loss if both
          engines agree (for 3 consecutive moves) that one of them is behind
          more than a user-adjustable score threshold.  For the latter
          adjudication to work, XBoard should be able to properly understand the
          engine's scores. To facilitate the latter, you can inform xboard here
          if the engines report scores from the viewpoint of white, or from that
          of their own color.

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          The following options occur in a dialog summoned by the ICS Options
          menu item.

          Auto Kibitz
               Setting this option when playing with or aginst a chess program
               on an ICS will cause the last line of thinking output of the
               engine before its move to be sent to the ICS in a kibitz command.
               In addition, any kibitz message received through the ICS from an
               opponent chess program will be diverted to the engine-output
               window, (and suppressed in the console), where you can play
               through its PV by right-clicking it.

          Auto Comment
               If this option is on, any remarks made on ICS while you are
               observing or playing a game are recorded as a comment on the
               current move.  This includes remarks made with the ICS commands
               `say', `tell', `whisper', and `kibitz'.  Limitation: remarks that
               you type yourself are not recognized; XBoard scans only the
               output from ICS, not the input you type to it.

          Auto Observe
               If this option is on and you add a player to your `gnotify' list
               on ICS, XBoard will automatically observe all of that player's
               games, unless you are doing something else (such as observing or
               playing a game of your own) when one starts.  The games are
               displayed from the point of view of the player on your gnotify
               list; that is, his pawns move from the bottom of the window
               towards the top.  Exceptions:  If both players in a game are on
               your gnotify list, if your ICS `highlight' variable is set to 0,
               or if the ICS you are using does not properly support observing
               from Black's point of view, you will see the game from White's
               point of view.

          Auto Raise Board
               If this option is on, whenever a new game begins, the chessboard
               window is deiconized (if necessary) and raised to the top of the
               stack of windows.

          Auto Save
               If this option is true, at the end of every game XBoard prompts
               you for a file name and appends a record of the game to the file
               you specify. Disabled if the `saveGameFile' command-line option
               is set, as in that case all games are saved to the specified
               file.  See Load and Save options.

          Background Observe
               Setting this option will make XBoard suppress display of any
               boards from observed games while you are playing.  In stead the
               last such board will be remembered, and shown to you when you
               right-click the board.  This allows you to peek at your bughouse
               partner's game when you want, without disturbing your own game

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               too much.

          Dual Board
               Setting this option in combination with `Background Observe' will
               display boards of observed games while you are playing on a
               second board next to that of your own game.

          Get Move List
               If this option is on, whenever XBoard receives the first board of
               a new ICS game (or a different game from the one it is currently
               displaying), it retrieves the list of past moves from the ICS.
               You can then review the moves with the `Forward' and `Backward'
               commands or save them with `Save Game'.  You might want to turn
               off this option if you are observing several blitz games at once,
               to keep from wasting time and network bandwidth fetching the move
               lists over and over.  When you turn this option on from the menu,
               XBoard immediately fetches the move list of the current game (if
               any).

          Quiet Play
               If this option is on, XBoard will automatically issue an ICS `set
               shout 0' command whenever you start a game and a `set shout 1'
               command whenever you finish one.  Thus, you will not be
               distracted by shouts from other ICS users while playing.

          Seek Graph
               Setting this option will cause XBoard to display an graph of
               currently active seek ads when you left-click the board while
               idle and logged on to an ICS.

          Auto-Refresh Seek Graph
               In combination with the `Seek Graph' option this will cause
               automatic update of the seek graph while it is up.  This only
               works on FICS and ICC, and requires a lot of bandwidth on a busy
               server.

          Premove
          Premove White
          Premove Black
          First White Move
          First Black Move
               If this option is on while playing a game on an ICS, you can
               register your next planned move before it is your turn.  Move the
               piece with the mouse in the ordinary way, and the starting and
               ending squares will be highlighted with a special color (red by
               default).  When it is your turn, if your registered move is
               legal, XBoard will send it to ICS immediately; if not, it will be
               ignored and you can make a different move.  If you change your
               mind about your premove, either make a different move, or
               double-click on any piece to cancel the move entirely.

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               You can also enter premoves for the first white and black moves
               of the game.

          ICS Alarm
          ICS Alarm Time
               When this option is on, an alarm sound is played when your clock
               counts down to the icsAlarmTime in an ICS game.  (By default, the
               time is 5 seconds, but you can pecify other values with the Alarm
               Time spin control.) For games with time controls that include an
               increment, the alarm will sound each time the clock counts down
               to the icsAlarmTime.  By default, the alarm sound is the terminal
               bell, but on some systems you can change it to a sound file using
               the soundIcsAlarm option; see below.

          Colorize Messages
               Ticking this options causes various types of ICS messages do be
               displayed with different foreground or background colors in the
               console.  The colors can be individually selected for each type,
               through the accompanying text edits.

          Summons a dialog where you can set options important for playing
          automatic matches between two chess programs (e.g. by using the
          `Machine Match' menu item in the `Mode' menu).

          Tournament file
               To run a tournament, XBoard needs a file to record its progress,
               so it can resume the tourney when it is interrupted.  When you
               want to conduct anything more complex than a simple two-player
               match with the currently loaded engines, (i.e. when you select a
               list of participants), you must not leave this field blank. When
               you enter the name of an existing tournament file, XBoard will
               ignore all other input specified in the dialog, and will take
               them from that tournament file.  This resumes an interrupted
               tournament, or adds another XBoard agent playing games for it to
               those that are already doing so.  Specifying a not-yet-existing
               file will cause XBoard to create it, according to the tournament
               parameters specified in the rest of the dialog, before it starts
               the tournament on OK. Provided that you specify
               participants; without participants no tournament file will be
               made, but other entered values (e.g. for the file with opening
               positions) will take effect. Default: configured by the
               `defaultTourneyName' option.

          Sync after round
          Sync after cycle
               The sync options, when on, will cause WinBoard to refrain from
               starting games of the next round or cycle before all games of the
               previous round or cycle are finished.  This guarantees correct
               ordering in the games file, even when multiple XBoard instances
               are concurrently playing games for the same tourney.  Default:
               sync after cycle, but not after round.

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          Select Engine
          Tourney participants
               With the Select Engine drop-down list you can pick an engine from
               your list of installed engines in the settings file, to be added
               to the tournament. The engines selected so far will be listed in
               the Tourney participants memo. The latter is a normal text
               edit, so you can use normal text-editing functions to delete
               engines you selected by accident, or change their order. Do not
               type names yourself there, because names that do not exactly
               match one of the names from the drop-down list will lead to
               undefined behavior.

          Tourney type
               Here you can specify the type of tournament you want. XBoards
               intrinsic tournament manager support round-robins (type = 0),
               where each participant plays every other participant, and
               (multi-)gauntlets, where one (or a few) so-called gauntlet
               engines play an independent set of opponents. In the latter
               case, you specify the number of gauntlet engines. E.g. if you
               specified 10 engines, and tourney type = 2, the first 2 engines
               each play the remaining 8. A value of -1 instructs XBoard to play
               Swiss; for this to work an external pairing engine must be
               specified through the `pairingEngine' option.  Each Swiss round
               will be considered a tourney cycle in that case.  Default:0

          Number of tourney cycles
          Default number of Games
               You can specify tourneys where every two opponents play each
               other multiple times. Such multiple games can be played in a row,
               as specified by the number of games per pairing, or by
               repeating the entire tournament schedule a number of times
               (specified by the number of tourney cycles). The total
               number of times two engine meet will be the product of these two.
               Default is 1 cycle; the number of games per pairing is the same
               as the default number of match games, stored in your settings
               file through the `defaultMatchGames' option.

          Save Tourney Games
               File where the tournament games are saved (duplicate of the item
               in the `Save Game Options').

          Game File with Opening Lines
          File with Start Positions
          Game Number
          Position Number
          Rewind Index after
               These items optionally specify the file with move sequences or
               board positions the tourney games should start from.  The
               corresponding numbers specify the number of the game or position
               in the file.  Here a value -1 means automatic stepping through
               all games on the file, -2 automatic stepping every two games.

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               The Rewind-Index parameter causes a stepping index to reset to
               one after reaching a specified value.  A setting of -2 for the
               game number will also be effective in a tournament without
               specifying a game file, but playing from the GUI book instead.
               In this case the first (odd) games will randomly select from the
               book, but the second (even) games will select the same moves from
               the book as the previous game.  (Note this leads to the same
               opening only if both engines use the GUI book!) Default: No game
               or position file will be used. The default index if such a file
               is used is 1.

          Disable own engine bools be default
               Setting this option reverses the default situation for use of the
               GUI opening book in tournaments from what it normally is, namely
               not using it.  So unless the engine is installed with an option
               to explicitly specify it should not use the GUI book (i.e. `-
               firstHasOwnBookUCI true'), it will be made to use the GUI book.

          Replace Engine
          Upgrade Engine
               With these two buttons you can alter the participants of an
               already running tournament.  After opening the Match Options
               dialog on an XBoard that is playing for the tourney, you will see
               all the tourney parameters in the dialog fields.  You can then
               replace the name of one engine by that of another by editing the
               `participants' field.  (But preserve the order of the others!)
               Pressing the button after that will cause the substitution.  With
               the `Upgrade Engine' button the substitution will only affect
               future games.  With `Replace Engine' all games the substituted
               engine has already played will be invalidated, and they will be
               replayed with the substitute engine.  In this latter case the
               engine must not be playing when you do this, but otherwise there
               is no need to pause the tournament play for making a
               substitution.

          Clone Tourney
               Pressing this button after you have specified an existing
               tournament file will copy the contents of the latter to the
               dialog, and then puts the originally proposed name for the
               tourney file back.  You can then run a tourney with the same
               parameters (possibly after changing the proposed name of the
               tourney file for the new tourney) by pressing 'OK'.

          Summons a dialog where you can set the `autoDisplayComment' and
          `autoDisplayTags' options, (which control popups when viewing loaded
          games), and specify the rate at which loaded games are auto-played, in
          seconds per move (which can be a fractional number, like 1.6).  You
          can also set search criteria for determining which games will be
          displayed in the Game List for a multi-game file, and thus be eligible
          for loading:

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          Elo of strongest player
          Elo of weakest player
          year These numeric fields set thresholds (lower limits) on the Elo
               rating of the mentioned player, or the date the game was played.
               Defaults: 0

          Search mode
               This setting determines which positions in a game will be
               considered a match to the position currently displayed in the
               board window when you press the `find position' button in the
               Game List.  You can search for an exact match, a position that
               has all shown material in the same place, but might contain
               additional material, a position that has all Pawns in the same
               place, but can have the shown material anywhere, a position
               that     can have all shown material anywhere, or a position that
               has material between certain limits anywhere.  For the latter you
               have to place the material that must be present in the four
               lowest ranks of the board, and optional additional material in
               the four highest ranks of the board.  You can request the
               optional material to be balanced.  The `narrow' button is similar
               in fuction to the `find position' button, but only searches in
               the already selected games, rather than the complete game file,
               and can thus be used to refine a search based on multiple
               criteria.

          number of consecutive positions
               When you are searching by material, rather than for an exact
               match, this parameter indicates forhowmany consecutive game
               positions the same amount of material must be on the board before
               it is considered a match.

          Also match reversed colors
          Also match left-right flipped position
               When looking for matching positions rather than by material,
               these settings determine whether mirror images (in case of a
               vertical flip in combination with color reversal) will be also
               considered a match.  The left-right flipping is only useful after
               all castling rights have expired (or in Xiangqi).

          Summons a dialog where you can specify the files on which XBoard
          should automatically save any played or entered games, (the
          `saveGameFile' option), or the final position of such games (the
          `savePositionfile' option).  You can also select 'auto-save' without a
          file name, in which case XBoard will prompt the user for a file name
          after each game.  In ICS mode you can limit the auto-saving to your
          own games (i.e. suppress saving of observed games).  You can also set
          the default value for the PGN Event tag that will be used for each new
          game you start.  Various options for the format of the game can be
          specified as well, such as whether scores and depths of engine games
          should be saved as comments, and if a tag with info about the score
          with which the engine came out of book should be included.  For Chess,

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          always set the format to PGN, rather than "old save stye"!

          Pops up a dialog where you can select the PGN tags that should appear
          on the lines in the game list, and their order.

          Summons a dialog where you can specify the sounds that should
          accompany various events that can occur XBoard.  Most events are only
          relevant to ICS play, but the move sound is an important exception.
          For each event listed in the dialog, you can select a standard sound
          from a menu.  You can also select a user-supplied sound file, by
          typing its name into the designated text-edit field first, and then
          selecting "Above WAV File" from the menu for the event.  A dummy event
          has been provided for trying out the sounds with the "play" button
          next to it.  The directory with standard sounds, and the external
          program for playing the sounds can be specified too, but normally you
          would not touch these once XBoard is properly installed.  When a move
          sound other than 'None' is selected, XBoard alerts you by playing that
          sound after each of your opponent's moves (or after every move if you
          are observing a game on the Internet Chess Server).  The sound is not
          played after moves you make or moves read from a saved game file.

          Selecting this menu item causes the current XBoard settings to be
          written to the settings file, so they will also apply in future
          sessions.  Note that some settings are 'volatile', and are not saved,
          because XBoard considers it too unlikely that you want those to apply
          next time.  In particular this applies to the Chess program names, and
          all options giving information on those Chess programs (such as their
          directory, if they have their own opening book, if they are UCI or
          native XBoard), or the variant you are playing.  Such options would
          still be understood when they appear in the settings file in case they
          were put there with the aid of a text editor, but they would disappear
          from the file as soon as you save the settings.

          Note that XBoard no longer pays attention to options values specified
          in the .Xresources file.  (Specifying key bindings there will still
          work, though.) To alter the default of volatile options, you can use
          the following method: Rename your ~/.xboardrc settings file (to
          ~/.yboardrc, say), and create a new file ~/.xboardrc, which only
          contains the options

              -settingsFile  ~/.yboardrc
              -saveSettingsFile  ~/.yboardrc

          This will cause your settings to be saved on ~/.yboardrc in the
          future, so that ~/.xboardrc is no longer overwritten.  You can then
          safely specify volatile options in ~/.xboardrc, either before or after
          the settingsFile options.  Note that when you specify persistent
          options after the settingsFile options in ~/.xboardrc, you will
          essentially turn them into volatile options with the specified value
          as default, because that value will overrule the value loaded from the
          settings file (being read later).

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          Setting this option has no immediate effect, but causes the settings
          to be saved when you quit XBoard. What happens then is otherwise
          identical to what happens when you use select "Save Settings Now", see
          there.

        Help Menu
          Info XBoard
               Displays the XBoard documentation in info format.  For this
               feature to work, you must have the GNU info program installed on
               your system, and the file `xboard.info' must either be present in
               the current working directory, or have been installed by the
               `make install' command when you built XBoard.

          Man XBoard
               Displays the XBoard documentation in man page format.  The `F1'
               key is a keyboard equivalent.  For this feature to work, the file
               `xboard.6' must have been installed by the `make install' command
               when you built XBoard, and the directory it was placed in must be
               on the search path for your system's `man' command.

          About XBoard
               Shows the current XBoard version number.

        Other Shortcut Keys
          Show Last Move
               By hitting `Enter' the last move will be re-animated.

          Load Next Game
               Loads the next game from the last game record file you loaded.
               The `Alt+PgDn' key triggers this action.

          Load Previous Game
               Loads the previous game from the last game record file you
               loaded.  The `Alt+PgUp' key triggers this action.  Not available
               if the last game was loaded from a pipe.

          Reload Same Game
               Reloads the last game you loaded.  Not available if the last game
               was loaded from a pipe.  Currently no keystroke is assigned to
               this ReloadGameProc.

          Reload Same Position
               Reloads the last position you loaded.  Not available if the last
               position was loaded from a pipe.  Currently no keystroke is
               assigned to this ReloadPositionProc.

          You can add or remove shortcut keys using the X resources
          `form.translations'. Here is an example of what would go in your
          `.Xresources' file:

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              XBoard*form.translations: \
                Shift<Key>?: AboutGameProc() \n\
                <Key>y: AcceptProc() \n\
                <Key>n: DeclineProc() \n\
                <Key>i: NothingProc()

          Binding a key to `NothingProc' makes it do nothing, thus removing it
          as a shortcut key. The XBoard commands that can be bound to keys are:

              AbortProc, AboutGameProc, AboutProc, AcceptProc, AdjournProc,
              AlwaysQueenProc, AnalysisModeProc, AnalyzeFileProc,
              AnimateDraggingProc, AnimateMovingProc, AutobsProc, AutoflagProc,
              AutoflipProc, AutoraiseProc, AutosaveProc, BackwardProc,
              BlindfoldProc, BookProc, CallFlagProc, CopyGameProc, CopyPositionProc,
              DebugProc, DeclineProc, DrawProc, EditCommentProc, EditGameProc,
              EditPositionProc, EditTagsProc, EnterKeyProc, FlashMovesProc,
              FlipViewProc, ForwardProc, GetMoveListProc, HighlightLastMoveProc,
              HintProc, IcsAlarmProc, IcsClientProc, IcsInputBoxProc,
              InfoProc, LoadGameProc, LoadNextGameProc, LoadNextPositionProc,
              LoadPositionProc, LoadPrevGameProc, LoadPrevPositionProc,
              LoadSelectedProc, MachineBlackProc, MachineWhiteProc, MailMoveProc,
              ManProc, MoveNowProc, MoveSoundProc, NothingProc, OldSaveStyleProc,
              PasteGameProc, PastePositionProc, PauseProc, PeriodicUpdatesProc,
              PonderNextMoveProc, PopupExitMessageProc, PopupMoveErrorsProc,
              PremoveProc, QuietPlayProc, QuitProc, ReloadCmailMsgProc,
              ReloadGameProc, ReloadPositionProc, RematchProc, ResetProc,
              ResignProc, RetractMoveProc, RevertProc, SaveGameProc,
              SavePositionProc, ShowCoordsProc, ShowGameListProc, ShowThinkingProc,
              StopExaminingProc, StopObservingProc, TestLegalityProc, ToEndProc,
              ToStartProc, TrainingProc, TruncateGameProc, and TwoMachinesProc.

     OPTIONS
          This section documents the command-line options to XBoard.  You can
          set these options in two ways: by typing them on the shell command
          line you use to start XBoard, or by editing the settings file (usually
          ~/.xboardrc) to alter the value of the setting that was saved there.
          Some of the options cannot be changed while XBoard is running; others
          set the initial state of items that can be changed with the Options
          menu.

          Most of the options have both a long name and a short name. To turn a
          boolean option on or off from the command line, either give its long
          name followed by the value true or false (`-longOptionName true'), or
          give just the short name to turn the option on (`-opt'), or the short
          name preceded by `x' to turn the option off (`-xopt'). For options
          that take strings or numbers as values, you can use the long or short
          option names interchangeably.

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        Chess Engine Options
          -tc or -timeControl minutes[:seconds]
               Each player begins with his clock set to the `timeControl'
               period.  Default: 5 minutes.  The additional options
               `movesPerSession' and `timeIncrement' are mutually exclusive.

          -mps or -movesPerSession moves
               When both players have made `movesPerSession' moves, a new
               `timeControl' period is added to both clocks.  Default: 40 moves.

          -inc or -timeIncrement seconds
               If this option is specified, `movesPerSession' is ignored.
               Instead, after each player's move, `timeIncrement' seconds are
               added to his clock. Use `-inc 0' if you want to require the
               entire game to be played in one `timeControl' period, with no
               increment.  Default: -1, which specifies `movesPerSession' mode.

          -clock/-xclock or -clockMode true/false
               Determines whether or not to display the chess clocks. If
               clockMode is false, the clocks are not shown, but the side that
               is to play next is still highlighted. Also, unless `searchTime'
               is set, the chess engine still keeps track of the clock time and
               uses it to determine how fast to make its moves.

          -st or -searchTime minutes[:seconds]
               Tells the chess engine to spend at most the given amount of time
               searching for each of its moves. Without this option, the chess
               engine chooses its search time based on the number of moves and
               amount of time remaining until the next time control.  Setting
               this option also sets clockMode to false.

          -depth or -searchDepth number
               Tells the chess engine to look ahead at most the given number of
               moves when searching for a move to make. Without this option, the
               chess engine chooses its search depth based on the number of
               moves and amount of time remaining until the next time control.
               With the option, the engine will cut off its search early if it
               reaches the specified depth.

          -firstNPS number
          -secondNPS number
               Tells the chess engine to use an internal time standard based on
               its node count, rather then wall-clock time, to make its timing
               decisions. The time in virtual seconds should be obtained by
               dividing the node count through the given number, like the number
               was a rate in nodes per second. Xboard will manage the clocks in
               accordance with this, relying on the number of nodes reported by
               the engine in its thinking output. If the given number equals
               zero, it can obviously not be used to convert nodes to seconds,
               and the time reported by the engine is used to decrement the
               XBoard clock in stead. The engine is supposed to report in CPU

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               time it uses, rather than wall-clock time, in this mode. This
               option can provide fairer conditions for engine-engine matches on
               heavily loaded machines, or with very fast games (where the wall
               clock is too inaccurate). `showThinking' must be on for this
               option to work. Default: -1 (off).  Not many engines might
               support this yet!

          -firstTimeOdds factor
          -secondTimeOdds factor
               Reduces the time given to the mentioned engine by the given
               factor. If pondering is off, the effect is indistinguishable from
               what would happen if the engine was running on an n-times slower
               machine. Default: 1.

          -timeOddsMode mode
               This option determines how the case is handled where both engines
               have a time-odds handicap. If mode=1, the engine that gets the
               most time will always get the nominal time, as specified by the
               time-control options, and its opponent's time is renormalized
               accordingly. If mode=0, both play with reduced time. Default: 0.

          -hideThinkingFromHuman true/false
               Controls the Hide Thinking option. See Options Menu. Default:
               true.  (Replaces the Show-Thinking option of older xboard
               versions.)

          -thinking/-xthinking or -showThinking true/false
               Forces the engine to send thinking output to xboard. Used to be
               the only way to control if thinking output was displayed in older
               xboard versions, but as the thinking output in xboard 4.3 is also
               used for several other purposes (adjudication, storing in PGN
               file) the display of it is now controlled by the new option Hide
               Thinking. See Options Menu. Default: false.  (But if xboard needs
               the thinking output for some purpose, it makes the engine send it
               despite the setting of this option.)

          -ponder/-xponder or -ponderNextMove true/false
               Sets the Ponder Next Move menu option. See Options Menu. Default:
               true.

          -smpCores number
               Specifies the maximum number of CPUs an SMP engine is allowed to
               use.  Only works for engines that support the XBoard/WinBoard-
               protocol cores feature.

          -mg or -matchGames n
               Automatically runs an n-game match between two chess engines,
               with alternating colors.  If the `loadGameFile' or
               `loadPositionFile' option is set, XBoard starts each game with
               the given opening moves or the given position; otherwise, the
               games start with the standard initial chess position.  If the

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               `saveGameFile' option is set, a move record for the match is
               appended to the specified file. If the `savePositionFile' option
               is set, the final position reached in each game of the match is
               appended to the specified file. When the match is over, XBoard
               displays the match score and exits. Default: 0 (do not run a
               match).

          -mm/-xmm or -matchMode true/false
               Setting `matchMode' to true is equivalent to setting `matchGames'
               to 1.

          -sameColorGames n
               Automatically runs an n-game match between two chess engines,
               without alternating colors.  Otherwise the same applies as for
               the `-matchGames' option, over which it takes precedence if both
               are specified. (See there.) Default: 0 (do not run a match).

          -fcp or -firstChessProgram program
               Name of first chess engine.  Default: `Fairy-Max'.

          -scp or -secondChessProgram program
               Name of second chess engine, if needed.  A second chess engine is
               started only in Two Machines (match) mode.  Default: `Fairy-Max'.

          -fe or -firstEngine nickname
               This is an alternative to the `fcp' option for specifying the
               first engine, for engines that were already configured (using the
               `Load Engine' dialog) in XBoard's settings file.  It will not
               only retrieve the real name of the engine, but also all options
               configured with it.  (E.g. if it is UCI, whether it should use
               book.)

          -se or -secondEngine nickname
               As `fe', but for the second engine.

          -fb/-xfb or -firstPlaysBlack true/false
               In games between two chess engines, firstChessProgram normally
               plays white.  If this option is true, firstChessProgram plays
               black.  In a multi-game match, this option affects the colors
               only for the first game; they still alternate in subsequent
               games.

          -fh or -firstHost host
          -sh or -secondHost host
               Hosts on which the chess engines are to run. The default for each
               is `localhost'. If you specify another host, XBoard uses `rsh' to
               run the chess engine there. (You can substitute a different
               remote shell program for rsh using the `remoteShell' option
               described below.)

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          -fd or -firstDirectory dir
          -sd or -secondDirectory dir
               Working directories in which the chess engines are to be run.
               The default is "", which means to run the chess engine in the
               same working directory as XBoard itself.  (See the CHESSDIR
               environment variable.) This option is effective only when the
               chess engine is being run on the local host; it does not work if
               the engine is run remotely using the -fh or -sh option.

          -initString string or -firstInitString
          -secondInitString string
               The string that is sent to initialize each chess engine for a new
               game.  Default:

                   new
                   random

               Setting this option from the command line is tricky, because you
               must type in real newline characters, including one at the very
               end.  In most shells you can do this by entering a `\' character
               followed by a newline. Using the character sequence `\n' in the
               string should work too, though.

               If you change this option, don't remove the `new' command; it is
               required by all chess engines to start a new game.

               You can remove the `random' command if you like; including it
               causes GNU Chess 4 to randomize its move selection slightly so
               that it doesn't play the same moves in every game.  Even without
               `random', GNU Chess 4 randomizes its choice of moves from its
               opening book.  Many other chess engines ignore this command
               entirely and always (or never) randomize.

               You can also try adding other commands to the initString; see the
               documentation of the chess engine you are using for details.

          -firstComputerString string
          -secondComputerString string
               The string that is sent to the chess engine if its opponent is
               another computer chess engine.  The default is `computer\n'.
               Probably the only useful alternative is the empty string (`'),
               which keeps the engine from knowing that it is playing another
               computer.

          -reuse/-xreuse or -reuseFirst true/false
          -reuse2/-xreuse2 or -reuseSecond true/false
               If the option is false, XBoard kills off the chess engine after
               every game and starts it again for the next game. If the option
               is true (the default), XBoard starts the chess engine only once
               and uses it repeatedly to play multiple games.  Some old chess
               engines may not work properly when reuse is turned on, but

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               otherwise games will start faster if it is left on.

          -firstProtocolVersion version-number
          -secondProtocolVersion version-number
               This option specifies which version of the chess engine
               communication protocol to use.  By default, version-number is 2.
               In version 1, the "protover" command is not sent to the engine;
               since version 1 is a subset of version 2, nothing else changes.
               Other values for version-number are not supported.

          -firstScoreAbs true/false
          -secondScoreAbs true/false
               If this option is set, the score reported by the engine is taken
               to be that in favor of white, even when the engine plays black.
               Important when XBoard uses the score for adjudications, or in PGN
               reporting.

          -niceEngines priority
               This option allows you to lower the priority of the engine
               processes, so that the generally insatiable hunger for CPU time
               of chess engines does not interfere so much with smooth operation
               of XBoard (or the rest of your system). Negative values could
               increase the engine priority, which is not recommended.

          -firstOptions string
          -secondOptions string
               The given string is a comma-separated list of (option name=option
               value) pairs, like the following example: "style=Karpov,blunder
               rate=0". If an option announced by the engine at startup through
               the feature commands of the XBoard/WinBoard protocol matches one
               of the option names (i.e. "style" or "blunder rate"), it would be
               set to the given value (i.e. "Karpov" or 0) through a
               corresponding option command to the engine. This provided that
               the type of the value (text or numeric) matches as well.

          -firstNeedsNoncompliantFEN string
          -secondNeedsNoncompliantFEN string
               The castling rights and e.p. fields of the FEN sent to the
               mentioned engine with the setboard command will be replaced by
               the given string. This can for instance be used to run engines
               that do not understand Chess960 FENs in variant fischerandom, to
               make them at least understand the opening position, through
               setting the string to "KQkq -". (Note you also have to give the
               e.p. field!) Other possible applications are to provide work-
               arounds for engines that want to see castling and e.p. fields in
               variants that do not have castling or e.p. (shatranj, courier,
               xiangqi, shogi) so that XBoard would normally omit them (string =
               "- -"), or to add variant-specific fields that are not yet
               supported by XBoard (e.g. to indicate the number of checks in
               3check).

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          -shuffleOpenings
               Forces shuffling of the opening setup in variants that normally
               have a fixed initial position.  Shufflings are symmetric for
               black and white, and exempt King and Rooks in variants with
               normal castling.  Remains in force until a new variant is
               selected.

        UCI + WB Engine Settings
          -fUCI or -firstIsUCI true/false
          -sUCI or -secondIsUCI true/false
               Indicates if the mentioned engine executable file is an UCI
               engine, and should be run with the aid of the Polyglot adapter
               rather than directly. Xboard will then pass the other UCI options
               and engine name to Polyglot on its command line, according to the
               option `adapterCommand'.

          -fUCCI
          -sUCCI
          -fUSI
          -sUSI
               Options similar to `fUCI' and `sUCI', except that they use the
               indicated engine with the protocol adapter specified in the
               `uxiAdapter' option.  This can then be configured for running an
               UCCI or USI adapter, as the need arises.

          -adapterCommand string
               The string conatins the command that should be issued by XBoard
               to start an engine that is accompanied by the `fUCI' option.  Any
               identifier following a percent sign in the command (e.g. %fcp)
               will be considered the name of an XBoard option, and be replaced
               by the value of that option at the time the engine is started.
               For starting the second engine, any leading "f" or "first" in the
               option name will first be replaced by "s" or "second", before
               finding its value.  Default: 'polyglot -noini -ec "%fcp" -ed
               "%fd"'

          -uxiAdapter string
               Similar to `adapterCommand', but used for engines accompanied by
               the `fUCCI' or `fUSI' option, so you can configure XBoard to be
               ready to handle more than one flavor of non-native protocols.
               Default: ""

          -polyglotDir filename
               Gives the name of the directory in which the Polyglot adapter for
               UCI engines resides.  Default: "".

          -usePolyglotBook true/false
               Specifies if the Polyglot book should be used as GUI book.

          -polyglotBook filename
               Gives the filename of the opening book.  The book is only used

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               when the `usePolyglotBook' option is set to true, and the option
               `firstHasOwnBookUCI' or `secondHasOwnBookUCI' applying to the
               engine is set to false.  The engine will be kept in force mode as
               long as the current position is in book, and XBoard will select
               the book moves for it. Default: "".

          -fNoOwnBookUCI or -firstXBook or -firstHasOwnBookUCI true/false
          -sNoOwnBookUCI or -secondXBook or -secondHasOwnBookUCI true/false
               Indicates if the mentioned engine has its own opening book it
               should play from, rather than using the external book through
               XBoard. Default: depends on setting of the option
               `discourageOwnBooks'.

          -discourageOwnBooks true/false
               When set, newly loaded engines will be assumed to use the GUI
               book, unless they explicitly specify differently.  Otherwise they
               will be assumed to not use the GUI book, unless the specify
               differently (e.g. with `firstXBook').  Default: false.

          -bookDepth n
               Limits the use of the GUI book to the first n moves of each side.
               Default: 12.

          -bookVariation n
               A value n from 0 to 100 tunes the choice of moves from the GUI
               books from totally random to best-only. Default: 50

          -mcBookMode
               When this volatile option is specified, the probing algorithm of
               the GUI book is altered to always select the move that is most
               under-represented based on its performance.  When all moves are
               played in approximately the right proportion, a book miss will be
               reported, to give the engine opportunity to explore a new move.
               In addition score of the moves will be kept track of during the
               session in a book buffer.  By playing an match in this mode, a
               book will be built from scratch.  The only output are the saved
               games, which can be converted to an actual book later, with the
               `Save Games as Book' command.  This command can also be used to
               pre-fill the book buffer before adding new games based on the
               probing algorithm.

          -fn string or -firstPgnName string
          -sn string or -secondPgnName string
               Indicates the name that should be used for the engine in PGN tags
               of engine-engine games.  Intended to allow you to install verions
               of the same engine with different settings, and still distinguish
               them.  Default: "".

          -defaultHashSize n
               Sets the size of the hash table to n MegaBytes. Together with the
               EGTB cache size this number is also used to calculate the memory

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               setting of XBoard/WinBoard engines, for those that support the
               memory feature of the XBoard/WinBoard protocol. Default: 64.

          -defaultCacheSizeEGTB n
               Sets the size of the EGTB cache to n MegaBytes. Together with the
               hash-table size this number is also used to calculate the memory
               setting of XBoard/WinBoard engines, for those that support the
               memory feature of the XBoard/WinBoard protocol. Default: 4.

          -defaultPathEGTB filename
               Gives the name of the directory where the end-game tablebases are
               installed, for UCI engines.  Default: "/usr/local/share/egtb".

          -egtFormats string
               Specifies which end-game tables are installed on the computer,
               and where. The argument is a comma-separated list of format
               specifications, each specification consisting of a format name, a
               colon, and a directory path name, e.g.
               "nalimov:/usr/local/share/egtb". If the name part matches that of
               a format that the engine requests through a feature command,
               xboard will relay the path name for this format to the engine
               through an egtpath command. One egtpath command for each matching
               format will be sent. Popular formats are "nalimov" DTM tablebases
               and "scorpio" bitbases.  Default: "".

          -firstChessProgramNames={names}
               This option lets you customize the drop-down list of chess engine
               names that appears in the `Load Engine' and `Match Options'
               dialog. It consists of a list of strings, one per line. When an
               engine is loaded, the corresponding line is prefixed with "-fcp
               ", and processed like it appeared on the command line.  That
               means that apart from the engine command, it can contain any list
               of XBoard options you want to use with this engine.  (Commonly
               used options here are -fd, -firstXBook, -fUCI, -variant.)

               The value of this option is gradually built as you load new
               engines through the `Load Engine' menu dialog, with `Add to list'
               ticked. To change it, edit your settings file with a plain text
               editor.

        Tournament options
          -defaultMatchGames n
               Sets the number of games that will be used for a match between
               two engines started from the menu to n. Also used as games per
               pairing in other tournament formats.  Default: 10.

          -matchPause n
               Specifies the duration of the pause between two games of a match
               or tournament between engines as n milliseconds.  Especially
               engines that do not support ping need this option, to prevent
               that the move they are thinking on when an opponent unexpectedly

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               resigns will be counted for the next game, (leading to illegal
               moves there).  Default: 10000.

          -tf filename or -tourneyFile filename
               Specifies the name of the tournament file used in match mode to
               conduct a multi-player tournament. This file is a special
               settings file, which stores the description of the tournament
               (including progress info), through normal options (e.g. for time
               control, load and save files), and through some special-purpose
               options listed below.

          -tt number or -tourneyType number
               Specifies the type of tourney: 0 = round-robin, N>0 = (multi-
               )gauntlet with N gauntlet engines, -1 = Swiss through external
               pairing engine. Volatile option, but stored in tourney file.

          -cy number or -tourneyCycles number
               Specifies the number of cycles in a tourney. Volatile option, but
               stored in tourney file.

          -participants list
               The list is a multi-line text string that specifies engines
               occurring in the `firstChesProgramNames' list in the settings
               file by their (implied or explicitly given) nicknames, one engine
               per line. The mentioned engines will play in the tourney.
               Volatile option, but stored in tourney file.

          -results string
               The string of +=- characters lists the result of all played games
               in a toruney. Games currently playing are listed as *, while a
               space indicates a game that is not yet played or playing .
               Volatile option, but stored in tourney file.

          -defaultTourneyName string
               Specifies the name of the tournament file XBoard should propose
               when the `Match Options' dialog is opened. Any %y, %M, %d, %h,
               %m, %s in the string are replaced by the current year, month, day
               of the month, hours, minutes, seconds of the current time,
               respectively, as two-digit number. A %Y would be replaced by the
               year as 4-digit number. Default: empty string.

          -pairingEngine filename
               Specifies the external program to be used to pair the
               participants in Swiss tourneys. XBoard communicates with this
               engine in the same way as it communicates with Chess engines. The
               only commands sent to the pairing engine are results N
               string, (where N is the number of participants, and string the
               results so far in the format of the results option), and
               pairing N, (where N is the number of the tourney game). To
               the latter the pairing engine should answer with A-B, where
               A and B are participant numbers (in the range 1-N). (There should

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               be no reply to the results command.) Default: empty string.

          -afterGame string
          -afterTourney string
               When non-empty, the given string will be executed as a system
               command after each tournament game, orafterthe tourney completes,
               respectively.  This can be used, for example, to autmatically run
               a cross-table generator on the PGN file where games are saved, to
               update the tourney standings.  Default: ""

          -syncAfterRound true/false
          -syncAfterCycle true/false
               Controls whether different instances of XBoard concurrently
               running the same tournament will wait for each other.  Defaults:
               sync after cycle, but not after round.

          -seedBase number
               Used to store the seed of the pseudo-random-number generator in
               the tourneyFile, so that separate instances of XBoard working on
               the same tourney can take coherent 'random' decisions, such as
               picking an opening for a given game number.

        ICS options
          -ics/-xics or -internetChessServerMode true/false
               Connect with an Internet Chess Server to play chess against its
               other users, observe games they are playing, or review games that
               have recently finished. Default: false.

          -icshost or -internetChessServerHost host
               The Internet host name or address of the chess server to connect
               to when in ICS mode. Default: `chessclub.com'.  Another popular
               chess server to try is `freechess.org'.  If your site doesn't
               have a working Internet name server, try specifying the host
               address in numeric form. You may also need to specify the numeric
               address when using the icshelper option with timestamp or
               timeseal (see below).

          -icsport or -internetChessServerPort port-number
               The port number to use when connecting to a chess server in ICS
               mode. Default: 5000.

          -icshelper or -internetChessServerHelper prog-name
               An external helper program used to communicate with the chess
               server.  You would set it to "timestamp" for ICC (chessclub.com)
               or "timeseal" for FICS (freechess.org), after obtaining the
               correct version of timestamp or timeseal for your computer.  See
               "help timestamp" on ICC and "help timeseal" on FICS.  This option
               is shorthand for `-useTelnet -telnetProgram program'.

          -telnet/-xtelnet or -useTelnet true/false
               This option is poorly named; it should be called useHelper.  If

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               set to true, it instructs XBoard to run an external program to
               communicate with the Internet Chess Server. The program to use is
               given by the telnetProgram option.  If the option is false (the
               default), XBoard opens a TCP socket and uses its own internal
               implementation of the telnet protocol to communicate with the
               ICS. See Firewalls.

          -telnetProgram prog-name
               This option is poorly named; it should be called helperProgram.
               It gives the name of the telnet program to be used with the
               `gateway' and `useTelnet' options.  The default is `telnet'. The
               telnet program is invoked with the value of
               `internetChessServerHost' as its first argument and the value of
               `internetChessServerPort' as its second argument.  See Firewalls.

          -gateway host-name
               If this option is set to a host name, XBoard communicates with
               the Internet Chess Server by using `rsh' to run the
               `telnetProgram' on the given host, instead of using its own
               internal implementation of the telnet protocol. You can
               substitute a different remote shell program for `rsh' using the
               `remoteShell' option described below.  See Firewalls.

          -internetChessServerCommPort or -icscomm dev-name
               If this option is set, XBoard communicates with the ICS through
               the given character I/O device instead of opening a TCP
               connection.  Use this option if your system does not have any
               kind of Internet connection itself (not even a SLIP or PPP
               connection), but you do have dial-up access (or a hardwired
               terminal line) to an Internet service provider from which you can
               telnet to the ICS.

               The support for this option in XBoard is minimal. You need to set
               all communication parameters and tty modes before you enter
               XBoard.

               Use a script something like this:

                   stty raw -echo 9600 > /dev/tty00
                   xboard -ics -icscomm /dev/tty00

               Here replace `/dev/tty00' with the name of the device that your
               modem is connected to. You might have to add several more options
               to these stty commands. See the man pages for `stty' and `tty' if
               you run into problems. Also, on many systems stty works on its
               standard input instead of standard output, so you have to use `<'
               instead of `>'.

               If you are using linux, try starting with the script below.
               Change it as necessary for your installation.

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                   #!/bin/sh -f
                   # configure modem and fire up XBoard

                   # configure modem
                   (
                     stty 2400 ; stty raw ; stty hupcl ; stty -clocal
                     stty ignbrk ; stty ignpar ; stty ixon ; stty ixoff
                     stty -iexten ; stty -echo
                   ) < /dev/modem
                   xboard -ics -icscomm /dev/modem

               After you start XBoard in this way, type whatever commands are
               necessary to dial out to your Internet provider and log in.  Then
               telnet to ICS, using a command like `telnet chessclub.com 5000'.
               Important: See the paragraph below about extra echoes, in
               Limitations.

          -icslogon or -internetChessServerLogonScript file-name
               Whenever XBoard connects to the Internet Chess Server, if it
               finds a file with the name given in this option, it feeds the
               file's contents to the ICS as commands. The default file name is
               `.icsrc'.  Usually the first two lines of the file should be your
               ICS user name and password.  The file can be either in $CHESSDIR,
               in XBoard's working directory if CHESSDIR is not set, or in your
               home directory.

          -msLoginDelay delay
               If you experience trouble logging on to an ICS when using the `-
               icslogon' option, inserting some delay between characters of the
               logon script may help. This option adds `delay' milliseconds of
               delay between characters. Good values to try are 100 and 250.

          -icsinput/-xicsinput or -internetChessServerInputBox true/false
               Sets the ICS Input Box menu option. See Mode Menu. Default:
               false.

          -autocomm/-xautocomm or -autoComment true/false
               Sets the Auto Comment menu option. See Options Menu. Default:
               false.

          -autoflag/-xautoflag or -autoCallFlag true/false
               Sets the Auto Flag menu option.  See Options Menu. Default:
               false.

          -autobs/-xautobs or -autoObserve true/false
               Sets the Auto Observe menu option.  See Options Menu. Default:
               false.

          -autoKibitz
               Enables kibitzing of the engines last thinking output (depth,
               score, time, speed, PV) before it moved to the ICS, in zippy

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               mode. The option `showThinking' must be switched on for this
               option to work.  Also diverts similar kibitz information of an
               opponent engine that is playing you through the ICS to the
               engine-output window, as if the engine was playing locally.

          -seekGraph true/false or -sg
               Enables displaying of the seek graph by left-clicking the board
               when you are logged on to an ICS and currently idle.  The seek
               graph show all players currently seeking games on the ICS,
               plotted according to their rating and the time control of the
               game they seek, in three different colors (for rated, unrated and
               wild games).  Computer ads are displayed as squares, human ads
               are dots.  Default: false.

          -autoRefresh true/false
               Enables automatic updating of the seek graph, by having the ICS
               send a running update of all newly placed and removed seek ads.
               This consumes a substantial amount of communication bandwidth,
               and is only supported for FICS and ICC.  Default: false.

          -backgroundObserve true/false
               When true, boards sent to you by the ICS from other games while
               you are playing (e.g. because you are observing them) will not be
               automatically displayed.  Only a summary of time left and
               material of both players will appear in the message field above
               the board.  XBoard will remember the last board it has received
               this way, and will display it in stead of the position in your
               own game when you press the right mouse button.  No other
               information is stored on such games observed in the background;
               you cannot save such a game later, or step through its moves.
               This feature is provided solely for the benefit of bughouse
               players, to enable them to peek at their partner's game without
               the need to logon twice.  Default: false.

          -dualBoard true/false
               In combination with -backgroundObserve true, this option will
               display the board of the background game side by side with that
               of your own game, so you can have it in view permanently.  Any
               board or holdings info coming in will be displayed on the
               secondary board immediately.  This feature is still experimental
               and largely unfinished.  There is no animation or highlighting of
               moves on the secondary board.  Default: false.

          -disguisePromotedPieces true/false
               When set promoted Pawns in crazyhouse/bughouse are displayed
               identical to primordial pieces of the same type, rather than
               distinguishable.  Default: true.

          -moves/-xmoves or -getMoveList true/false
               Sets the Get Move List menu option.  See Options Menu.  Default:
               true.

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          -alarm/-xalarm or -icsAlarm true/false
               Sets the ICS Alarm menu option.  See Options Menu. Default: true.

          -icsAlarmTime ms
               Sets the time in milliseconds for the ICS Alarm menu option.  See
               Options Menu. Default: 5000.

          lowTimeWarning true/false
               Controls a color change of the board as a warning your time is
               running out.  See Options Menu. Default: false.

          -pre/-xpre or -premove true/false
               Sets the Premove menu option. See Options Menu. Default: true.

          -prewhite/-xprewhite or -premoveWhite
          -preblack/-xpreblack or -premoveBlack
          -premoveWhiteText string
          -premoveBlackText string
               Set the menu options for specifying the first move for either
               color. See Options Menu. Defaults: false and empty strings, so no
               pre-moves.

          -quiet/-xquiet or -quietPlay true/false
               Sets the Quiet Play menu option.  See Options Menu.  Default:
               false.

          -colorizeMessages or -colorize/-xcolorize
               Setting colorizeMessages to true tells XBoard to colorize the
               messages received from the ICS.  Colorization works only if your
               xterm supports ISO 6429 escape sequences for changing text
               colors.  Default: true.

          -colorShout foreground,background,bold
          -colorSShout foreground,background,bold
          -colorCShout foreground,background,bold
          -colorChannel1 foreground,background,bold
          -colorChannel foreground,background,bold
          -colorKibitz foreground,background,bold
          -colorTell foreground,background,bold
          -colorChallege foreground,background,bold
          -colorRequest foreground,background,bold
          -colorSeek foreground,background,bold
          -colorNormal foreground,background,bold
               These options set the colors used when colorizing ICS messages.
               All ICS messages are grouped into one of these categories: shout,
               sshout, channel 1, other channel, kibitz, tell, challenge,
               request (including abort, adjourn, draw, pause, and takeback), or
               normal (all other messages).

               Each foreground or background argument can be one of the
               following: black, red, green, yellow, blue, magenta, cyan, white,

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               or default.  Here ``default'' means the default foreground or
               background color of your xterm.  Bold can be 1 or 0.  If
               background is omitted, ``default'' is assumed; if bold is
               omitted, 0 is assumed.

          -soundProgram progname
               If this option is set to a sound-playing program that is
               installed and working on your system, XBoard can play sound files
               when certain events occur, listed below.  The default program
               name is "play".  If any of the sound options is set to "$", the
               event rings the terminal bell by sending a ^G character to
               standard output, instead of playing a sound file.  If an option
               is set to the empty string "", no sound is played for that event.

          -soundDirectory directoryname
               This option specifies where XBoard will look for sound files,
               when these are not given as an absolute path name.

          -soundShout filename
          -soundSShout filename
          -soundCShout filename
          -soundChannel filename
          -soundChannel1 filename
          -soundKibitz filename
          -soundTell filename
          -soundChallenge filename
          -soundRequest filename
          -soundSeek filename
               These sounds are triggered in the same way as the colorization
               events described above.  They all default to "", no sound.  They
               are played only if the colorizeMessages is on.  CShout is
               synonymous with SShout.

          -soundMove filename
               This sound is used by the Move Sound menu option.  Default: "$".

          -soundIcsAlarm filename
               This sound is used by the ICS Alarm menu option.  Default: "$".

          -soundIcsWin filename
               This sound is played when you win an ICS game.  Default: "" (no
               sound).

          -soundIcsLoss filename
               This sound is played when you lose an ICS game.  Default: "" (no
               sound).

          -soundIcsDraw filename
               This sound is played when you draw an ICS game.  Default: "" (no
               sound).

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          -soundIcsUnfinished filename
               This sound is played when an ICS game that you are participating
               in is aborted, adjourned, or otherwise ends inconclusively.
               Default: "" (no sound).

        Load and Save options
          -lgf or -loadGameFile file
          -lgi or -loadGameIndex index
               If the `loadGameFile' option is set, XBoard loads the specified
               game file at startup. The file name `-' specifies the standard
               input. If there is more than one game in the file, XBoard pops up
               a menu of the available games, with entries based on their PGN
               (Portable Game Notation) tags.  If the `loadGameIndex' option is
               set to `N', the menu is suppressed and the N th game found in the
               file is loaded immediately.  The menu is also suppressed if
               `matchMode' is enabled or if the game file is a pipe; in these
               cases the first game in the file is loaded immediately.  Use the
               `pxboard' shell script provided with XBoard if you want to pipe
               in files containing multiple games and still see the menu.  If
               the loadGameIndex specifies an index -1, this triggers auto-
               increment of the index in `matchMode', which means that after
               every game the index is incremented by one, causing each game of
               the match to be played from the next game in the file. Similarly,
               specifying an index value of -2 causes the index to be
               incremented every two games, so that each game in the file is
               used twice (with reversed colors).  The `rewindIndex' option
               causes the index to be reset to the first game of the file when
               it has reached a specified value.

          -rewindIndex n
               Causes a position file or game file to be rewound to its
               beginning after n positions or games in auto-increment
               `matchMode'. See `loadPositionIndex' and `loadGameIndex'.
               default: 0 (no rewind).

          -td or -timeDelay seconds
               Time delay between moves during `Load Game' or `Analyze File'.
               Fractional seconds are allowed; try `-td 0.4'. A time delay value
               of -1 tells XBoard not to step through game files automatically.
               Default: 1 second.

          -sgf or -saveGameFile file
               If this option is set, XBoard appends a record of every game
               played to the specified file. The file name `-' specifies the
               standard output.

          -autosave/-xautosave or -autoSaveGames true/false
               Sets the Auto Save menu option.  See Options Menu.  Default:
               false.  Ignored if `saveGameFile' is set.

                                       - 47 -        Formatted:  January 7, 2014

     xboard(6)                           GNU                           xboard(6)
                                       $Date:

          -onlyOwnGames true/false
               Suppresses auto-saving of ICS observed games. Default: false.

          -lpf or -loadPositionFile file
          -lpi or -loadPositionIndex index
               If the `loadPositionFile' option is set, XBoard loads the
               specified position file at startup. The file name `-' specifies
               the standard input. If the `loadPositionIndex' option is set to
               N, the Nth position found in the file is loaded; otherwise the
               first position is loaded.  If the loadPositionIndex specifies an
               index -1, this triggers auto-increment of the index in
               `matchMode', which means that after every game the index is
               incremented by one, causing each game of the match to be played
               from the next position in the file. Similarly, specifying an
               index value of -2 causes the index to be incremented every two
               games, so that each position in the file is used twice (with the
               engines playing opposite colors).  The `rewindIndex' option
               causes the index to be reset to the first position of the file
               when it has reached a specified value.

          -spf or -savePositionFile file
               If this option is set, XBoard appends the final position reached
               in every game played to the specified file. The file name `-'
               specifies the standard output.

          -pgnExtendedInfo true/false
               If this option is set, XBoard saves depth, score and time used
               for each move that the engine found as a comment in the PGN file.
               Default: false.

          -pgnEventHeader string
               Sets the name used in the PGN event tag to string. Default:
               "Computer Chess Game".

          -pgnNumberTag true/false
               Include the (unique) sequence number of a tournament game into
               the saved PGN file as a 'number' tag.  Default: false.

          -saveOutOfBookInfo true/false
               Include the information on how the engine(s) game out of its
               opening book in a special 'annotator' tag with the PGN file.
               Default: true.

          -oldsave/-xoldsave or -oldSaveStyle true/false
               Sets the Old Save Style menu option.  See Options Menu.  Default:
               false.

          -gameListTags string
               The character string lists the PGN tags that should be printed in
               the Game List, and their order. The meaning of the codes is
               e=event, s=site, d=date, o=round, p=players, r=result, w=white

                                       - 48 -        Formatted:  January 7, 2014

     xboard(6)                           GNU                           xboard(6)
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               Elo, b=black Elo, t=time control, v=variant, a=out-of-book info,
               c=result comment.  Default: "eprd"

          -ini or -settingsFile filename
          -saveSettingsFile filename
          @filename
               When XBoard encounters an option -settingsFile (or -ini for
               short), or @filename, it tries to read the mentioned file, and
               substitutes the contents of it (presumaby more command-line
               options) in place of the option.  In the case of -ini or
               -settingsFile, the name of a successfully read settings file is
               also remembered as the file to use for saving settings
               (automatically on exit, or on user command).  An option of the
               form @filename does not affect saving.  The option
               -saveSettingsFile does specify a name of the file to use for
               saving, without reading any options from it, and is thus also
               effective when the file did not exist yet.  So the settings will
               be saved to the file specified in the last -saveSettingsFile or
               succesfull -settingsFile / -ini command, if any, and in
               /etc/xboard/xboard.conf otherwise.  Usualy the latter is only
               accessible for the system administrator, though, and will be used
               to contain system-wide default setings, amongst which a
               -saveSettingsFile and -settingsFile options to specify a settings
               file accessible to the individual user, such as ~/.xboardrc in
               the user's home directory.

          -saveSettingsOnExit true/false
               Controls saving of options on the settings file.  See Options
               Menu.  Default: true.

        User interface options
          -display
          -geometry
          -iconic
          -name
               These and most other standard Xt options are accepted.

          -noGUI
               Suppresses all GUI functions of XBoard (to speed up automated
               ultra-fast engine-engine games, which you don't want to watch).
               There will be no board or clock updates, no printing of moves,
               and no update of the icon on the task bar in this mode.

          -logoSize N
               This option controls the drawing of player logos next to the
               clocks.  The integer N specifies the width of the logo in pixels;
               the logo height will always be half the width.  When N = 0, no
               logos will be diplayed.  Default: 0.

          -firstLogo imagefile

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                                       $Date:

          -secondLogo imagefile
               Specify the images to be used as player logos when `logoSize' is
               non-zero, next to the white and black clocks, respectively.

          -autoLogo true/false

          -logoDir filename
               When `autoLogo' is set, XBoard will search for a PNG image file
               with the name of the engine or ICS in the directory specified by
               `logoDir'.

          -recentEngines number
          -recentEngineList list
               When the number is larger than zero, it determines how many
               recently used engines will be appended at the bottom of the
               `Engines' menu.  The engines will be saved in your settings file
               as the option `recentEngineList', by their nicknames, and the
               most recently used one will always be sorted to the top.  If the
               list after that is longer than the specified number, the last one
               is discarded.  Changes in the list will only become visible the
               next session, provided you saved the settings.  Default: 6.

          -oneClickMove true/false
               When set, this option allows you to enter moves by only clicking
               the to- or from-square, when only a single legal move to or from
               that square is possible.  Double-clicking a piece (or clicking an
               already selected piece) will instruct that piece to make the only
               capture it can legally do.  Default: false.

          -movesound/-xmovesound or -ringBellAfterMoves true/false
               Sets the Move Sound menu option.  See Options Menu.  Default:
               false.  For compatibility with old XBoard versions, -bell/-xbell
               are also accepted as abbreviations for this option.

          -exit/-xexit or -popupExitMessage true/false
               Sets the Popup Exit Message menu option.  See Options Menu.
               Default: true.

          -popup/-xpopup or -popupMoveErrors true/false
               Sets the Popup Move Errors menu option.  See Options Menu.
               Default: false.

          -queen/-xqueen or -alwaysPromoteToQueen true/false
               Sets the Always Queen menu option.  See Options Menu.  Default:
               false.

          -sweepPromotions true/false
               Sets the `Almost Always Promote to Queen' menu option. See
               Options Menu.  Default: false.

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     xboard(6)                           GNU                           xboard(6)
                                       $Date:

          -legal/-xlegal or -testLegality true/false
               Sets the Test Legality menu option.  See Options Menu.  Default:
               true.

          -size or -boardSize (sizeName | n1,n2,n3,n4,n5,n6,n7)
               Determines how large the board will be, by selecting the pixel
               size of the pieces and setting a few related parameters.  The
               sizeName can be one of: Titanic, giving 129x129 pixel pieces,
               Colossal 116x116, Giant 108x108, Huge 95x95, Big 87x87, Large
               80x80, Bulky 72x72, Medium 64x64, Moderate 58x58, Average 54x54,
               Middling 49x49, Mediocre 45x45, Small 40x40, Slim 37x37, Petite
               33x33, Dinky 29x29, Teeny 25x25, or Tiny 21x21.  Xboard installs
               with a set of scalable (svg) piece images, which it scales to any
               of the requested sizes.  The square size can further be
               continuously scaled by sizing the board window, but this only
               adapts the size of the pieces, and has no effect on the width of
               the grid lines or the font choice (both of which would depend on
               he selected boardSize).  The default depends on the size of your
               screen; it is approximately the largest size that will fit
               without clipping.

               You can select other sizes or vary other layout parameters by
               providing a list of comma-separated values (with no spaces) as
               the argument.  You do not need to provide all the values; for any
               you omit from the end of the list, defaults are taken from the
               nearest built-in size.  The value `n1' gives the piece size, `n2'
               the width of the black border between squares, `n3' the desired
               size for the clockFont, `n4' the desired size for the coordFont,
               `n5' the desired size for the messageFont, `n6' the smallLayout
               flag (0 or 1), and `n7' the tinyLayout flag (0 or 1). All
               dimensions are in pixels.  If the border between squares is
               eliminated (0 width), the various highlight options will not
               work, as there is nowhere to draw the highlight.  If smallLayout
               is 1 and `titleInWindow' is true, the window layout is rearranged
               to make more room for the title.  If tinyLayout is 1, the labels
               on the menu bar are abbreviated to one character each and the
               buttons in the button bar are made narrower.

          -overrideLineGap n
               When n >= 0, this forces the width of the black border between
               squares to n pixels for any board size. Mostly used to suppress
               the grid entirely by setting n = 0, e.g. in xiangqi or just
               getting a prettier picture. When n < 0 this the size-dependent
               width of the grid lines is used. Default: -1.

          -coords/-xcoords or -showCoords true/false
               Sets the Show Coords menu option.  See Options Menu.  Default:
               false.  The `coordFont' option specifies what font to use.

          -autoraise/-xautoraise or -autoRaiseBoard true/false
               Sets the Auto Raise Board menu option.  See Options Menu.

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                                       $Date:

               Default: true.

          -autoflip/-xautoflip or -autoFlipView true/false
               Sets the Auto Flip View menu option.  See Options Menu.  Default:
               true.

          -flip/-xflip or -flipView true/false
               If Auto Flip View is not set, or if you are observing but not
               participating in a game, then the positioning of the board at the
               start of each game depends on the flipView option.  If flipView
               is false (the default), the board is positioned so that the white
               pawns move from the bottom to the top; if true, the black pawns
               move from the bottom to the top.  In any case, the Flip menu
               option (see Options Menu) can be used to flip the board after the
               game starts.

          -title/-xtitle or -titleInWindow true/false
               If this option is true, XBoard displays player names (for ICS
               games) and game file names (for `Load Game') inside its main
               window. If the option is false (the default), this information is
               displayed only in the window banner. You probably won't want to
               set this option unless the information is not showing up in the
               banner, as happens with a few X window managers.

          -buttons/-xbuttons or -showButtonBar True/False
               If this option is False, xboard omits the [<<] [<] [P] [>] [>>]
               button bar from the window, allowing the message line to be
               wider.  You can still get the functions of these buttons using
               the menus or their keyboard shortcuts.  Default: true.

          -evalZoom factor
               The score interval (-1,1) is blown up on the vertical axis of the
               Evaluation Graph by the given factor.  Default: 1

          -evalThreshold n
               Score below n (centiPawn) are plotted as 0 in the Evaluation
               Graph.  Default: 25

          -mono/-xmono or -monoMode true/false
               Determines whether XBoard displays its pieces and squares with
               two colors (true) or four (false). You shouldn't have to specify
               `monoMode'; XBoard will determine if it is necessary.

          -showTargetSquares true/false
               Determines whether XBoard can highlight the squares a piece has
               legal moves to, when you grab that piece with the mouse.
               Default: false.

          -flashCount count
          -flashRate rate

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          -flash/-xflash
               These options enable flashing of pieces when they land on their
               destination square.  `flashCount' tells XBoard how many times to
               flash a piece after it lands on its destination square.
               `flashRate' controls the rate of flashing (flashes/sec).
               Abbreviations: `flash' sets flashCount to 3.  `xflash' sets
               flashCount to 0.  Defaults:  flashCount=0 (no flashing),
               flashRate=5.

          -highlight/-xhighlight or -highlightLastMove true/false
               Sets the Highlight Last Move menu option. See Options Menu.
               Default: false.

          -highlightMoveWithArrow true/false
               Sets the Highlight with Arrow menu option. See Options Menu.
               Default: false.

          -blind/-xblind or -blindfold true/false
               Sets the Blindfold menu option.  See Options Menu.  Default:
               false.

          -periodic/-xperiodic or -periodicUpdates true/false
               Controls updating of current move andnode counts in analysis
               mode. Default: true.

          -fSAN
          -sSAN
               Causes the PV in thinking output of the mentioned engine to be
               converted to SAN before it is further processed.  Warning: this
               might lose engine output not understood by the parser, and uses a
               lot of CPU power.  Default: the PV is displayed exactly as the
               engine produced it.

          -showEvalInMoveHistory true/false
               Controls whether the evaluation scores and search depth of engine
               moves are displayed with the move in the move-history window.
               Default: true.

          -clockFont font
               The font used for the clocks. If the option value is a pattern
               that does not specify the font size, XBoard tries to choose an
               appropriate font for the board size being used.  Default: -*-
               helvetica-bold-r-normal--*-*-*-*-*-*-*-*.

          -coordFont font
               The font used for rank and file coordinate labels if `showCoords'
               is true. If the option value is a pattern that does not specify
               the font size, XBoard tries to choose an appropriate font for the
               board size being used.  Default: -*-helvetica-bold-r-normal--*-
               *-*-*-*-*-*-*.

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          -messageFont font
               The font used for popup dialogs, menus, comments, etc.  If the
               option value is a pattern that does not specify the font size,
               XBoard tries to choose an appropriate font for the board size
               being used.  Default: -*-helvetica-medium-r-normal--*-*-*-
               *-*-*-*-*.

          -fontSizeTolerance tol
               In the font selection algorithm, a nonscalable font will be
               preferred over a scalable font if the nonscalable font's size
               differs by `tol' pixels or less from the desired size.  A value
               of -1 will force a scalable font to always be used if available;
               a value of 0 will use a nonscalable font only if it is exactly
               the right size; a large value (say 1000) will force a nonscalable
               font to always be used if available.  Default: 4.

          -pid or -pieceImageDirectory dir
               This options control what piece images xboard uses.  XBoard will
               look in the specified directory for an image in png or svg format
               for every piece type, with names like BlackQueen.svg,
               WhiteKnight.svg etc.  When neither of these is found (or no valid
               directory is specified) XBoard will use the svg piece that was
               installed with it (from the source-tree directory `svg').  Both
               svg and png images will be scaled by XBoard to the required size,
               but the png pieces lose much in quality when scaled too much.

          -whitePieceColor color
          -blackPieceColor color
          -lightSquareColor color
          -darkSquareColor color
          -highlightSquareColor color
          -preoveHighlightColor color
          -lowTimeWarningColor color
               Colors to use for the pieces, squares, and square highlights.
               Defaults:

                   -whitePieceColor       #FFFFCC
                   -blackPieceColor       #202020
                   -lightSquareColor      #C8C365
                   -darkSquareColor       #77A26D
                   -highlightSquareColor  #FFFF00
                   -premoveHighlightColor #FF0000
                   -lowTimeWarningColor   #FF0000

               On a grayscale monitor you might prefer:

                   -whitePieceColor       gray100
                   -blackPieceColor       gray0
                   -lightSquareColor      gray80
                   -darkSquareColor       gray60

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     xboard(6)                           GNU                           xboard(6)
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                   -highlightSquareColor  gray100
                   -premoveHighlightColor gray70
                   -lowTimeWarningColor   gray70

               The PieceColor options only work properly if the image files
               defining the pieces were pure black & white (possibly anti-
               aliased to produce gray scales and semi-transparancy), like the
               pieces images that come with the install.  Their effect on
               colored pieces is undefined.  The SquareColor option only have an
               effect when no board textures are used.

          -trueColors true/false
               When set, this option suppresses the effect  of the PieceColor
               options mentioned above.  This is recommended for images that are
               already colored.

          -useBoardTexture true/false
          -liteBackTextureFile filename
          -darkBackTextureFile filename
               Indicate the png image files to be used for drawing the board
               squares, and if they should be used rather than using simple
               colors.  The algorithm for cutting squares out of a given bitmap
               is such that the picture is perfectly reproduced when a bitmap
               the size of the complete board is given.  Default: false and ""

          -drag/-xdrag or -animateDragging true/false
               Sets the Animate Dragging menu option. See Options Menu.
               Default: true.

          -animate/-xanimate or -animateMoving true/false
               Sets the Animate Moving menu option. See Options Menu.  Default:
               true.

          -animateSpeed n
               Number of milliseconds delay between each animation frame when
               Animate Moves is on.

          -autoDisplayComment true/false
          -autoDisplayTags true/false
               If set to true, these options cause the window with the move
               comments, and the window with PGN tags, respectively, to pop up
               automatically when such tags or comments are encountered during
               the replaying a stored or loaded game.  Default: true.

          -pasteSelection true/false
               If this option is set to true, the Paste Position and Paste Game
               options paste from the currently selected text.  If false, they
               paste from the clipboard.  Default: false.

          -autoCopyPV true|false
               When this option is set, the position displayed on the board when

                                       - 55 -        Formatted:  January 7, 2014

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               you terminate a PV walk (initiated by a right-click on board or
               engine-output window) will be automatically put on the clipboard
               as FEN.  Default: false.

          -dropMenu true|false
               This option allows you to emulate old behavior, where the right
               mouse button brings up the (now deprecated) drop menu rather than
               displaying the position at the end of the principal variation.
               Default: False.

          -pieceMenu true|false
               This option allows you to emulate old behavior, where the right
               mouse button brings up the (now deprecated) piece menu in Edit
               Position mode.  From this menu you can select the piece to put on
               the square you clicked to bring up the menu, or select items such
               as `clear board'.  You can also `promote' or `demote' a clicked
               piece to convert it into an unorthodox piece that is not directly
               in the menu, or give the move to `black' or `white'.

          -variations true|false
               When this option is on, you can start new variations in Edit Game
               or Analyze mode by holding the Shift key down while entering a
               move.  When it is off, the Shift key will be ignored.  Default:
               False.

          -appendPV true|false
               When this option is on, right-clicking a PV in the Engine Output
               window will play the first move of that PV in Analyze mode, or as
               many moves as you walk through by moving the mouse.  Default:
               False.

          -absoluteAnalysisScores true|false
               When true, scores on the Engine Output window during analysis
               will be printed from the white point-of-view, rather than the
               side-to-move point-of-view.  Default: False.

          -scoreWhite true|false
               When true, scores will always be printed from the white point-
               of-view, rather than the side-to-move point-of-view.  Default:
               False.

        Adjudication Options
          -adjudicateLossThreshold n
               If the given value is non-zero, XBoard adjudicates the game as a
               loss if both engines agree for a duration of 6 consecutive ply
               that the score is below the given score threshold for that
               engine. Make sure the score is interpreted properly by XBoard,
               using `-firstScoreAbs' and `-secondScoreAbs' if needed. Default:
               0 (no adjudication)

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          -adjudicateDrawMoves n
               If the given value is non-zero, XBoard adjudicates the game as a
               draw if after the given number of moves it was not yet decided.
               Default: 0 (no adjudication)

          -checkMates true/false
               If this option is set, XBoard detects all checkmates and
               stalemates, and ends the game as soon as they occur. Legality-
               testing must be switched on for this option to work.  Default:
               true

          -testClaims true/false
               If this option is set, XBoard verifies all result claims made by
               engines, and those who send false claims will forfeit the game
               because of it. Legality-testing must be switched on for this
               option to work. Default: true

          -materialDraws true/false
               If this option is set, XBoard adjudicates games as draws when
               there is no sufficient material left to inflict a checkmate. This
               applies to KBKB with like bishops (any number, actually), and to
               KBK, KNK and KK. Legality-testing must be switched on for this
               option to work. Default: true

          -trivialDraws true/false
               If this option is set, XBoard adjudicates games as draws that
               cannot be usually won without opponent cooperation. This applies
               to KBKB with unlike bishops, and to KBKN, KNKN, KNNK, KRKR and
               KQKQ. The draw is called after 6 ply into these end-games, to
               allow quick mates that can occur in some exceptional positions to
               be found by the engines. KQKQ does not really belong in this
               category, and might be taken out in the future. (When bitbase-
               based adjudications are implemented.) Legality-testing must be on
               for this option to work. Default: false

          -ruleMoves n
               If the given value is non-zero, XBoard adjudicates the game as a
               draw after the given number of consecutive reversible moves.
               Engine draw claims are always accepted after 50 moves,
               irrespective of the given value of n.

          -repeatsToDraw n
               If the given value is non-zero, xboard adjudicates the game as a
               draw if a position is repeated the given number of times. Engines
               draw claims are always accepted after 3 repeats, (on the 3rd
               occurrence, actually), irrespective of the value of n. Beware
               that positions that have different castling or en-passant rights
               do not count as repeats, XBoard is fully e.p. and castling aware!

        Other options

                                       - 57 -        Formatted:  January 7, 2014

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          -ncp/-xncp or -noChessProgram true/false
               If this option is true, XBoard acts as a passive chessboard; it
               does not start a chess engine at all. Turning on this option also
               turns off clockMode. Default: false.

          -viewer
          -viewerOptions string
               Presence of the volatile option `viewer' on the command line will
               cause the value of the persistent option `viewerOptions' as
               stored in the settings file to be appended to the command line.
               The `view' option will be used by desktop associations with game
               or position file types, so that `viewerOptions' can be used to
               configure the exact mode XBoard will start in when it should act
               on such a file (e.g. in -ncp mode, or analyzing with your
               favorite engine). The options are also automatically appended
               when Board is invoked with a single argument not being an option
               name, which is then assumed to be the name of a `loadGameFile' or
               (when the name ends in .fen) a `loadPositionFile'.  Default: "-
               ncp -engineOutputUp false -saveSettingsOnExit false".

          -tourneyOptions string
               When XBoard is invoked with a single argument that is a file with
               .trn extension, it will assume this argument to be the value of a
               `tourneyFile' option, and apped the value of the persistent
               option `tourneyOptions' as stored in the settings file to the
               command line.  Thus the value of `tourneyOptions' can be used to
               configure XBoard to automatically start running a tournament when
               it should act on such a file.  Default: "-ncp -mm
               -saveSettingsOnExit false".

          -mode or -initialMode modename
               If this option is given, XBoard selects the given modename from
               the Mode menu after starting and (if applicable) processing the
               loadGameFile or loadPositionFile option. Default: "" (no
               selection). Other supported values are MachineWhite,
               MachineBlack, TwoMachines, Analysis, AnalyzeFile, EditGame,
               EditPosition, and Training.

          -variant varname
               Activates preliminary, partial support for playing chess variants
               against a local engine or editing variant games.  This flag is
               not needed in ICS mode.  Recognized variant names are:

                   normal        Normal chess
                   wildcastle    Shuffle chess, king can castle from d file
                   nocastle      Shuffle chess, no castling allowed
                   fischerandom  Fischer Random shuffle chess
                   bughouse      Bughouse, ICC/FICS rules
                   crazyhouse    Crazyhouse, ICC/FICS rules
                   losers        Lose all pieces or get mated (ICC wild 17)
                   suicide       Lose all pieces including king (FICS)

                                       - 58 -        Formatted:  January 7, 2014

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                   giveaway      Try to have no legal moves (ICC wild 26)
                   twokings      Weird ICC wild 9
                   kriegspiel    Opponent's pieces are invisible
                   atomic        Capturing piece explodes (ICC wild 27)
                   3check        Win by giving check 3 times (ICC wild 25)
                   shatranj      An ancient precursor of chess (ICC wild 28)
                   xiangqi       Chinese Chess (on a 9x10 board)
                   shogi         Japanese Chess (on a 9x9 board & piece drops)
                   capablanca    Capablanca Chess (10x8 board, with Archbishop
                                 and Chancellor pieces)
                   gothic        similar, with a better initial position
                   caparandom    An FRC-like version of Capablanca Chess (10x8)
                   janus         A game with two Archbishops (10x8 board)
                   courier       Medieval intermediate between shatranj and
                                 modern Chess (on 12x8 board)
                   falcon        Patented 10x8 variant with two Falcon pieces
                   berolina      Pawns capture straight ahead, and move diagonal
                   cylinder      Pieces wrap around the board edge
                   knightmate    King moves as Knight, and vice versa
                   super         Superchess (shuffle variant with 4 exo-pieces)
                   makruk        Thai Chess (shatranj-like, P promotes on 6th rank)
                   spartan       Spartan Chess (black has unorthodox pieces)
                   fairy         A catchall variant in which all piece types
                                 known to XBoard can participate (8x8)
                   unknown       Catchall for other unknown variants

               NOT ALL BOARDSIZES PROVIDE A COMPLETE SET OF BUILT-IN BITMAPS FOR
               ALL UN-ORTHODOX PIECES, though. Only in `boardSize' middling and
               bulky all 22 piece types are provided, while -boardSize petite
               has most of them. Archbishop, Chancellor and Amazon are supported
               in every size from petite to bulky. Kings or Amazons are
               substituted for missing bitmaps. You can still play variants
               needing un-orthodox pieces in other board sizes providing your
               own bitmaps through the `bitmapDirectory' or `pixmapDirectory'
               options.

               In the shuffle variants, XBoard now does shuffle the pieces,
               although you can still do it by hand using Edit Position.  Some
               variants are supported only in ICS mode, including bughouse, and
               kriegspiel.  The winning/drawing conditions in crazyhouse (off-
               board interposition on mate) are not fully understood, but
               losers, suicide, giveaway, atomic, and 3check should be OK.
               Berolina and cylinder chess can only be played with legality
               testing off.  In crazyhouse, XBoard now does keep track of off-
               board pieces.  In shatranj it does implement the baring rule when
               mate detection is switched on.

          -boardHeight N
               Allows you to set a non-standard number of board ranks in any
               variant. If the height is given as -1, the default height for the
               variant is used.  Default: -1

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          -boardWidth N
               Allows you to set a non-standard number of board files in any
               variant. If the width is given as -1, the default width for the
               variant is used. With a non-standard width, the initial position
               will always be an empty board, as the usual opening array will
               not fit.  Default: -1

          -holdingsSize N
               Allows you to set a non-standard size for the holdings in any
               variant. If the size is given as -1, the default holdings size
               for the variant is used. The first N piece types will go into the
               holdings on capture, and you will be able to drop them on the
               board in stead of making a normal move. If size equals 0, there
               will be no holdings.  Default: -1

          -defaultFrcPosition N
               Specifies the number of the opening position in shuffle games
               like Chess960. A value of -1 means the position is randomly
               generated by XBoard at the beginning of every game.  Default: -1

          -pieceToCharTable string
               The characters that are used to represent the piece types XBoard
               knows in FEN diagrams and SAN moves. The string argument has to
               have an even length (or it will be ignored), as white and black
               pieces have to be given separately (in that order). The last
               letter for each color will be the King. The letters before that
               will be PNBRQ and then a whole host of fairy pieces in an order
               that has not fully crystallized yet (currently FEACWMOHIJGDVSLU,
               F=Ferz, Elephant, A=Archbishop, C=Chancellor, W=Wazir,
               M=Commoner, O=Cannon, H=Nightrider). You should list at least all
               pieces that occur in the variant you are playing. If you have
               less than 44 characters in the string, the pieces not mentioned
               will get assigned a period, and you will not be able to
               distinguish them in FENs. You can also explicitly assign pieces a
               period, in which case they will not be counted in deciding which
               captured pieces can go into the holdings.  A tilde '~' as a piece
               name does mean this piece is used to represent a promoted Pawn in
               crazyhouse-like games, i.e. on capture it turns back onto a Pawn.
               A '+' similarly indicates the piece is a shogi-style promoted
               piece, that should revert to its non-promoted version on capture
               (rather than to a Pawn).  Note that promoted pieces are
               represented by pieces 11 further in the list.  You should not
               have to use this option often: each variant has its own default
               setting for the piece representation in FEN, which should be
               sufficient in normal use.  Default: ""

          -pieceNickNames string
               The characters in the string are interpreted the same way as in
               the `pieceToCharTable' option. But on input, piece-ID letters are
               first looked up in the nicknames, and only if not defined there,
               in the normal pieceToCharTable. This allows you to have two

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               letters designate the same piece, (e.g. N as an alternative to H
               for Horse in Xiangqi), to make reading of non-compliant notations
               easier.  Default: ""

          -colorNickNames string
               The side-to-move field in a FEN will be first matched against the
               letters in the string (first character for white, second for
               black), before it is matched to the regular 'w' and 'b'.  This
               makes it easier to read non-compliant FENs, which, say, use 'r'
               for white.  Default: ""

          -debug/-xdebug or -debugMode true/false
               Turns on debugging printout.

          -debugFile filename or -nameOfDebugFile filename
               Sets the name of the file to which XBoard saves debug information
               (including all communication to and from the engines).  A `%d' in
               the given file name (e.g. game%d.debug) will be replaced by the
               unique sequence number of a tournament game, so that the debug
               output of each game will be written on a separate file.

          -engineDebugOutput number
               Specifies how XBoard should handle unsolicited output from the
               engine, with respect to saving it in the debug file. The output
               is further (hopefully) ignored. If number=0, XBoard refrains from
               writing such spurious output to the debug file. If number=1, all
               engine output is written faithfully to the debug file. If
               number=2, any protocol-violating line is prefixed with a '#'
               character, as the engine itself should have done if it wanted to
               submit info for inclusion in the debug file.  This option is
               provided for the benefit of applications that use the debug file
               as a source of information, such as the broadcaster of live games
               TLCV / TLCS. Such applications can be protected from spurious
               engine output that might otherwise confuse them.

          -rsh or -remoteShell shell-name
               Name of the command used to run programs remotely. The default is
               `rsh' or `remsh', determined when XBoard is configured and
               compiled.

          -ruser or -remoteUser user-name
               User name on the remote system when running programs with the
               `remoteShell'. The default is your local user name.

          -userName username
               Name under which the Human player will be listed in the PGN file.
               Default is the login name on your local computer.

          -delayBeforeQuit number
          -delayAfterQuit number
               These options specify how long XBoard has to wait before sending

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               a termination signal to rogue engine processes, that do not want
               to react to the 'quit' command. The second one determines the
               pause after killing the engine, to make sure it dies.

          -searchMode n
               The integer n encodes the mode for the `find position' function.
               Default: 1 (= Exact position match)

          -eloThresholdBoth elo
          -eloThresholdAny elo
               Defines a lower limit for the Elo rating, which has to be
               surpassed before a game will be considered when searching for a
               board position.  Default: 0

          -dateThreshold year
               Only games not played before the given year will be considered
               when searching for a board position

     CHESS SERVERS
          An "Internet Chess Server", or "ICS", is a place on the Internet where
          people can get together to play chess, watch other people's games, or
          just chat.  You can use either `telnet' or a client program like
          XBoard to connect to the server.  There are thousands of registered
          users on the different ICS hosts, and it is not unusual to meet 200 on
          both chessclub.com and freechess.org.

          Most people can just type `xboard -ics' to start XBoard as an ICS
          client.  Invoking XBoard in this way connects you to the Internet
          Chess Club (ICC), a commercial ICS.  You can log in there as a guest
          even if you do not have a paid account.  To connect to the largest
          Free ICS (FICS), use the command `xboard -ics -icshost freechess.org'
          instead, or substitute a different host name to connect to your
          favorite ICS.  For a full description of command-line options that
          control the connection to ICS and change the default values of ICS
          options, see ICS options.

          While you are running XBoard as an ICS client, you use the terminal
          window that you started XBoard from as a place to type in commands and
          read information that is not available on the chessboard.

          The first time you need to use the terminal is to enter your login
          name and password, if you are a registered player. (You don't need to
          do this manually; the `icsLogon' option can do it for you.  See ICS
          options.)  If you are not registered, enter `g' as your name, and the
          server will pick a unique guest name for you.

          Some useful ICS commands include

          help <topic>
               to get help on the given <topic>. To get a list of possible

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               topics type "help" without topic.  Try the help command before
               you ask other people on the server for help.

               For example `help register' tells you how to become a registered
               ICS player.

          who <flags>
               to see a list of people who are logged on.  Administrators
               (people you should talk to if you have a problem) are marked with
               the character `*', an asterisk. The <flags> allow you to display
               only selected players: For example, `who of' shows a list of
               players who are interested in playing but do not have an
               opponent.

          games
               to see what games are being played

          match <player> [<mins>] [<inc>]
               to challenge another player to a game. Both opponents get <mins>
               minutes for the game, and <inc> seconds will be added after each
               move.  If another player challenges you, the server asks if you
               want to accept the challenge; use the `accept' or `decline'
               commands to answer.

          accept
          decline
               to accept or decline another player's offer. The offer may be to
               start a new game, or to agree to a `draw', `adjourn' or `abort'
               the current game. See Action Menu.

               If you have more than one pending offer (for example, if more
               than one player is challenging you, or if your opponent offers
               both a draw and to adjourn the game), you have to supply
               additional information, by typing something like `accept
               <player>', `accept draw', or `draw'.

          draw
          adjourn
          abort
               asks your opponent to terminate a game by mutual agreement.
               Adjourned games can be continued later. Your opponent can either
               `decline' your offer or accept it (by typing the same command or
               typing `accept').  In some cases these commands work immediately,
               without asking your opponent to agree.  For example, you can
               abort the game unilaterally if your opponent is out of time, and
               you can claim a draw by repetition or the 50-move rule if
               available simply by typing `draw'.

          finger <player>
               to get information about the given <player>. (Default: yourself.)

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          vars to get a list of personal settings

          set <var> <value>
               to modify these settings

          observe <player>
               to observe an ongoing game of the given <player>.

          examine
          oldmoves
               to review a recently completed game

          Some special XBoard features are activated when you are in examine
          mode on ICS.  See the descriptions of the menu commands `Forward',
          `Backward', `Pause', `ICS Client', and `Stop Examining' on the Edit
          Menu, Mode Menu, and Action Menu.

     FIREWALLS
          By default, XBoard communicates with an Internet Chess Server by
          opening a TCP socket directly from the machine it is running on to the
          ICS. If there is a firewall between your machine and the ICS, this
          won't work. Here are some recipes for getting around common kinds of
          firewalls using special options to XBoard.  Important: See the
          paragraph in the below about extra echoes, in Limitations.

          Suppose that you can't telnet directly to ICS, but you can telnet to a
          firewall host, log in, and then telnet from there to ICS.  Let's say
          the firewall is called `firewall.example.com'. Set command-line
          options as follows:

              xboard -ics -icshost firewall.example.com -icsport 23

          Then when you run XBoard in ICS mode, you will be prompted to log in
          to the firewall host. This works because port 23 is the standard
          telnet login service. Do so, then telnet to ICS, using a command like
          `telnet chessclub.com 5000', or whatever command the firewall provides
          for telnetting to port 5000.

          If your firewall lets you telnet (or rlogin) to remote hosts but
          doesn't let you telnet to port 5000, you may be able to connect to the
          chess server on port 23 instead, which is the port the telnet program
          uses by default.  Some chess servers support this (including
          chessclub.com and freechess.org), while some do not.

          If your chess server does not allow connections on port 23 and your
          firewall does not allow you to connect to other ports, you may be able
          to connect by hopping through another host outside the firewall that
          you have an account on.  For instance, suppose you have a shell
          account at `foo.edu'. Follow the recipe above, but instead of typing
          `telnet chessclub.com 5000' to the firewall, type `telnet foo.edu' (or

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          `rlogin foo.edu'), log in there, and then type `telnet chessclub.com
          5000'.

          Suppose that you can't telnet directly to ICS, but you can use rsh to
          run programs on a firewall host, and that host can telnet to ICS.
          Let's say the firewall is called `rsh.example.com'. Set command-line
          options as follows:

              xboard -ics -gateway rsh.example.com -icshost chessclub.com

          Then when you run XBoard in ICS mode, it will connect to the ICS by
          using `rsh' to run the command `telnet chessclub.com 5000' on host
          `rsh.example.com'.

          Suppose that you can telnet anywhere you want, but you have to run a
          special program called `ptelnet' to do so.

          First, we'll consider the easy case, in which `ptelnet chessclub.com
          5000' gets you to the chess server.  In this case set command line
          options as follows:

              xboard -ics -telnet -telnetProgram ptelnet

          Then when you run XBoard in ICS mode, it will issue the command
          `ptelnet chessclub.com 5000' to connect to the ICS.

          Next, suppose that `ptelnet chessclub.com 5000' doesn't work; that is,
          your `ptelnet' program doesn't let you connect to alternative ports.
          As noted above, your chess server may allow you to connect on port 23
          instead.  In that case, just add the option `-icsport ""' to the above
          command.  But if your chess server doesn't let you connect on port 23,
          you will have to find some other host outside the firewall and hop
          through it. For instance, suppose you have a shell account at
          `foo.edu'. Set command line options as follows:

              xboard -ics -telnet -telnetProgram ptelnet -icshost foo.edu -icsport ""

          Then when you run XBoard in ICS mode, it will issue the command
          `ptelnet foo.edu' to connect to your account at `foo.edu'. Log in
          there, then type `telnet chessclub.com 5000'.

          ICC timestamp and FICS timeseal do not work through some firewalls.
          You can use them only if your firewall gives a clean TCP connection
          with a full 8-bit wide path.  If your firewall allows you to get out
          only by running a special telnet program, you can't use timestamp or
          timeseal across it.  But if you have access to a computer just outside
          your firewall, and you have much lower netlag when talking to that
          computer than to the ICS, it might be worthwhile running timestamp
          there.  Follow the instructions above for hopping through a host
          outside the firewall (foo.edu in the example), but run timestamp or
          timeseal on that host instead of telnet.

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          Suppose that you have a SOCKS firewall that will give you a clean 8-
          bit wide TCP connection to the chess server, but only after you
          authenticate yourself via the SOCKS protocol.  In that case, you could
          make a socksified version of XBoard and run that.  If you are using
          timestamp or timeseal, you will to socksify it, not XBoard; this may
          be difficult seeing that ICC and FICS do not provide source code for
          these programs.  Socksification is beyond the scope of this document,
          but see the SOCKS Web site at http://www.socks.permeo.com/.  If you
          are missing SOCKS, try http://www.funbureau.com/.

     ENVIRONMENT VARIABLES
          Game and position files are found in a directory named by the
          `CHESSDIR' environment variable. If this variable is not set, the
          current working directory is used. If `CHESSDIR' is set, XBoard
          actually changes its working directory to `$CHESSDIR', so any files
          written by the chess engine will be placed there too.

     LIMITATIONS AND KNOWN BUGS
          There is no way for two people running copies of XBoard to play each
          other without going through an Internet Chess Server.

          Under some circumstances, your ICS password may be echoed when you log
          on.

          If you are connecting to the ICS by running telnet on an Internet
          provider or firewall host, you may find that each line you type is
          echoed back an extra time after you hit <Enter>. If your Internet
          provider is a Unix system, you can probably turn its echo off by
          typing `stty -echo' after you log in, and/or typing <^E><Enter>
          (Ctrl+E followed by the Enter key) to the telnet program after you
          have logged into ICS.  It is a good idea to do this if you can,
          because the extra echo can occasionally confuse XBoard's parsing
          routines.

          The game parser recognizes only algebraic notation.

          Many of the following points used to be limitations in XBoard 4.2.7
          and earlier, but are now fixed: The internal move legality tester in
          XBoard 4.3.xx does look at the game history, and is fully aware of
          castling or en-passant-capture rights. It permits castling with the
          king on the d file because this is possible in some "wild 1" games on
          ICS. The piece-drop menu does not check piece drops in bughouse to see
          if you actually hold the piece you are trying to drop. But this way of
          dropping pieces should be considered an obsolete feature, now that
          pieces can be dropped by dragging them from the holdings to the board.
          Anyway, if you would attempt an illegal move when using a chess engine
          or the ICS, XBoard will accept the error message that comes back, undo
          the move, and let you try another.  FEN positions saved by XBoard do
          include correct information about whether castling or en passant are

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          legal, and also handle the 50-move counter.  The mate detector does
          not understand that non-contact mate is not really mate in bughouse.
          The only problem this causes while playing is minor: a "#" (mate
          indicator) character will show up after a non-contact mating move in
          the move list. XBoard will not assume the game is over at that point,
          not even when the option Detect Mates is on.  Edit Game mode always
          uses the rules of the selected variant, which can be a variant that
          uses piece drops. You can load and edit games that contain piece
          drops. The (obsolete) piece menus are not active, but you can perform
          piece drops by dragging pieces from the holdings.  Fischer Random
          castling is fully understood. You can enter castlings by dragging the
          King on top of your Rook. You can probably also play Fischer Random
          successfully on ICS by typing castling moves into the ICS Interaction
          window.

          The menus may not work if your keyboard is in Caps Lock or Num Lock
          mode.  This seems to be a problem with the Athena menu widget, not an
          XBoard bug.

          Also see the ToDo file included with the distribution for many other
          possible bugs, limitations, and ideas for improvement that have been
          suggested.

     REPORTING PROBLEMS
          You can report bugs and problems with XBoard using the bug tracker at
          `https://savannah.gnu.org/projects/xboard/' or by sending mail to
          `<bug-xboard@gnu.org>'.  It can also be useful to report or discuss
          bugs in the WinBoard Forum at `http://www.open-aurec.com/wbforum/',
          WinBoard development section.

          Please use the `script' program to start a typescript, run XBoard with
          the `-debug' option, and include the typescript output in your
          message.  Also tell us what kind of machine and what operating system
          version you are using.  The command `uname -a' will often tell you
          this.

          If you improve XBoard, please send a message about your changes, and
          we will get in touch with you about merging them in to the main line
          of development.

     AUTHORS AND CONTRIBUTORS
          Chris Sears and Dan Sears wrote the original XBoard.  They were
          responsible for versions 1.0 through 1.2.  The color scheme was taken
          from Wayne Christopher's `XChess' program.

          Tim Mann was primarily responsible for XBoard versions 1.3 through
          4.2.7, and for WinBoard (a port of XBoard to Microsoft Win32) from its
          inception through version 4.2.7.

          John Chanak contributed the initial implementation of ICS mode.  Evan

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          Welsh wrote `CMail', and Patrick Surry helped in designing, testing,
          and documenting it.  Elmar Bartel contributed the new piece bitmaps
          introduced in version 3.2.  Jochen Wiedmann converted the
          documentation to texinfo.  Frank McIngvale added click/click moving,
          the Analysis modes, piece flashing, ZIICS import, and ICS text
          colorization to XBoard.  Hugh Fisher added animated piece movement to
          XBoard, and Henrik Gram added it to WinBoard.  Mark Williams
          contributed the initial (WinBoard-only) implementation of many new
          features added to both XBoard and WinBoard in version 4.1.0, including
          copy/paste, premove, icsAlarm, autoFlipView, training mode, auto
          raise, and blindfold.  Ben Nye contributed X copy/paste code for
          XBoard.

          In a fork from version 4.2.7, Alessandro Scotti added many elements to
          the user interface of WinBoard, including the board textures and
          font-based rendering, the evaluation-graph, move-history and engine-
          output window.  He was also responsible for adding the UCI support.

          H. G. Muller continued this fork of the project, producing version
          4.3.  He made WinBoard castling- and e.p.-aware, added variant support
          with adjustable board sizes, the crazyhouse holdings, and the fairy
          pieces.  In addition he added most of the adjudication options, made
          WinBoard more robust in dealing with buggy and crashing engines, and
          extended time control with a time-odds and node-count-based modes.
          Most of the options that initially were WinBoard only have now been
          back-ported to XBoard.

          Michel van den Bergh provided the code for reading Polyglot opening
          books.

          Meanwhile, some work continued on the GNU XBoard project maintained at
          savannah.gnu.org, but version 4.2.8 was never released.  Daniel
          Mehrmann was responsible for much of this work.

          Most recently, Arun Persaud worked with H. G. Muller to merge all the
          features of the never-released XBoard/WinBoard 4.2.8 of the GNU XBoard
          project and the never-released 4.3.16 from H. G.'s fork into a unified
          XBoard/WinBoard 4.4, which is now available both from the
          savannah.gnu.org web site and the WinBoard forum.

     CMAIL
          The `cmail' program can help you play chess by email with opponents of
          your choice using XBoard as an interface.

          You will usually run `cmail' without giving any options.

        CMail options
          -h   Displays `cmail' usage information.

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          -c   Shows the conditions of the GNU General Public License.  See
               Copying.

          -w   Shows the warranty notice of the GNU General Public License.  See
               Copying.

          -v
          -xv  Provides or inhibits verbose output from `cmail' and XBoard,
               useful for debugging. The `-xv' form also inhibits the cmail
               introduction message.

          -mail
          -xmail
               Invokes or inhibits the sending of a mail message containing the
               move.

          -xboard
          -xxboard
               Invokes or inhibits the running of XBoard on the game file.

          -reuse
          -xreuse
               Invokes or inhibits the reuse of an existing XBoard to display
               the current game.

          -remail
               Resends the last mail message for that game. This inhibits
               running XBoard.

          -game <name>
               The name of the game to be processed.

          -wgames <number>
          -bgames <number>
          -games <number>
               Number of games to start as White, as Black or in total. Default
               is 1 as white and none as black. If only one color is specified
               then none of the other color is assumed. If no color is specified
               then equal numbers of White and Black games are started, with the
               extra game being as White if an odd number of total games is
               specified.

          -me <short name>
          -opp <short name>
               A one-word alias for yourself or your opponent.

          -wname <full name>
          -bname <full name>
          -myname <full name>
          -oppname <full name>
               The full name of White, Black, yourself or your opponent.

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          -wna <net address>
          -bna <net address>
          -na <net address>
          -oppna <net address>
               The email address of White, Black, yourself or your opponent.

          -dir <directory>
               The directory in which `cmail' keeps its files. This defaults to
               the environment variable `$CMAIL_DIR' or failing that,
               `$CHESSDIR', `$HOME/Chess' or `~/Chess'. It will be created if it
               does not exist.

          -arcdir <directory>
               The directory in which `cmail' archives completed games. Defaults
               to the environment variable `$CMAIL_ARCDIR' or, in its absence,
               the same directory as cmail keeps its working files (above).

          -mailprog <mail program>
               The program used by cmail to send email messages. This defaults
               to the environment variable `$CMAIL_MAILPROG' or failing that
               `/usr/ucb/Mail', `/usr/ucb/mail' or `Mail'. You will need to set
               this variable if none of the above paths fit your system.

          -logFile <file>
               A file in which to dump verbose debugging messages that are
               invoked with the `-v' option.

          -event <event>
               The PGN Event tag (default `Email correspondence game').

          -site <site>
               The PGN Site tag (default `NET').

          -round <round>
               The PGN Round tag (default `-', not applicable).

          -mode <mode>
               The PGN Mode tag (default `EM', Electronic Mail).

          Other options
               Any option flags not listed above are passed through to XBoard.
               Invoking XBoard through CMail changes the default values of two
               XBoard options: The default value for `-noChessProgram' is
               changed to true; that is, by default no chess engine is started.
               The default value for `-timeDelay' is changed to 0; that is, by
               default XBoard immediately goes to the end of the game as played
               so far, rather than stepping through the moves one by one.  You
               can still set these options to whatever values you prefer by
               supplying them on CMail's command line.  See Options.

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        Starting a CMail Game
          Type `cmail' from a shell to start a game as white. After an opening
          message, you will be prompted for a game name, which is optional -- if
          you simply press <Enter>, the game name will take the form `you-VS-
          opponent'. You will next be prompted for the short name of your
          opponent. If you haven't played this person before, you will also be
          prompted for his/her email address. `cmail' will then invoke XBoard in
          the background. Make your first move and select `Mail Move' from the
          `File' menu. See File Menu. If all is well, `cmail' will mail a copy
          of the move to your opponent. If you select `Exit' without having
          selected `Mail Move' then no move will be made.

        Answering a Move
          When you receive a message from an opponent containing a move in one
          of your games, simply pipe the message through `cmail'. In some
          mailers this is as simple as typing `| cmail' when viewing the
          message, while in others you may have to save the message to a file
          and do `cmail < file' at the command line. In either case `cmail' will
          display the game using XBoard. If you didn't exit XBoard when you made
          your first move then `cmail' will do its best to use the existing
          XBoard instead of starting a new one. As before, simply make a move
          and select `Mail Move' from the `File' menu. See File Menu. `cmail'
          will try to use the XBoard that was most recently used to display the
          current game. This means that many games can be in progress
          simultaneously, each with its own active XBoard.

          If you want to look at the history or explore a variation, go ahead,
          but you must return to the current position before XBoard will allow
          you to mail a move. If you edit the game's history you must select
          `Reload Same Game' from the `File' menu to get back to the original
          position, then make the move you want and select `Mail Move'.  As
          before, if you decide you aren't ready to make a move just yet you can
          either select `Exit' without sending a move or just leave XBoard
          running until you are ready.

        Multi-Game Messages
          It is possible to have a `cmail' message carry more than one game.
          This feature was implemented to handle IECG (International Email Chess
          Group) matches, where a match consists of one game as white and one as
          black, with moves transmitted simultaneously. In case there are more
          general uses, `cmail' itself places no limit on the number of
          black/white games contained in a message; however, XBoard does.

        Completing a Game
          Because XBoard can detect checkmate and stalemate, `cmail' handles
          game termination sensibly. As well as resignation, the `Action' menu
          allows draws to be offered and accepted for `cmail' games.

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                                       $Date:

          For multi-game messages, only unfinished and just-finished games will
          be included in email messages. When all the games are finished, they
          are archived in the user's archive directory, and similarly in the
          opponent's when he or she pipes the final message through `cmail'. The
          archive file name includes the date the game was started.

        Known CMail Problems
          It's possible that a strange conjunction of conditions may
          occasionally mean that `cmail' has trouble reactivating an existing
          XBoard. If this should happen, simply trying it again should work.  If
          not, remove the file that stores the XBoard's PID (`game.pid') or use
          the `-xreuse' option to force `cmail' to start a new XBoard.

          Versions of `cmail' after 2.16 no longer understand the old file
          format that XBoard used to use and so cannot be used to correspond
          with anyone using an older version.

          Versions of `cmail' older than 2.11 do not handle multi-game messages,
          so multi-game correspondence is not possible with opponents using an
          older version.

     OTHER PROGRAMS YOU CAN USE WITH
          Here are some other programs you can use with XBoard

        GNU Chess
          The GNU Chess engine is available from:

          ftp://ftp.gnu.org/gnu/gnuchess/

          You can use XBoard to play a game against GNU Chess, or to interface
          GNU Chess to an ICS.

        Fairy-Max
          Fairy-Max is a derivative from the once World's smallest Chess program
          micro-Max, which measures only about 100 lines of source code.  The
          main difference with micro-Max is that Fairy-Max loads its move-
          generator tables from a file, so that the rules for piece movement can
          be easily configured to implement unorthodox pieces.  Fairy-Max can
          therefore play a large number of variants, normal Chess being one of
          those.  In addition it plays Knightmate, Capablanca and Gothic Chess,
          Shatranj, Courier Chess, Cylinder chess, Berolina Chess, while the
          user can easily define new variants.  It can be obtained from:

          http://home.hccnet.nl/h.g.muller/dwnldpage.html

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                                       $Date:

        HoiChess
          HoiChess is a not-so-very-strong Chess engine, which comes with a
          derivative HoiXiangqi, able to play Chinese Chess. It can be obtained
          from the standard Linux repositories through:

          sudo apt-get install hoichess

        Crafty
          Crafty is a chess engine written by Bob Hyatt.  You can use XBoard to
          play a game against Crafty, hook Crafty up to an ICS, or use Crafty to
          interactively analyze games and positions for you.

          Crafty is a strong, rapidly evolving chess program. This rapid pace of
          development is good, because it means Crafty is always getting better.
          This can sometimes cause problems with backwards compatibility, but
          usually the latest version of Crafty will work well with the latest
          version of XBoard.  Crafty can be obtained from its author's FTP site:
          ftp://ftp.cis.uab.edu/hyatt/.

          To use Crafty with XBoard, give the -fcp and -fd options as follows,
          where <crafty's directory> is the directory in which you installed
          Crafty and placed its book and other support files.

        zic2xpm
          The ``zic2xpm'' program is used to import chess sets from the ZIICS(*)
          program into XBoard. ``zic2xpm'' is part of the XBoard distribution.
          ZIICS is available from:

          ftp://ftp.freechess.org/pub/chess/DOS/ziics131.exe

          To import ZIICS pieces, do this:

          1. Unzip ziics131.exe into a directory:

                   unzip -L ziics131.exe -d ~/ziics

          2. Use zic2xpm to convert a

               For example, let's say you want to use the FRITZ4 set. These
               files are named ``fritz4.*'' in the ZIICS distribution.

                   mkdir ~/fritz4
                   cd ~/fritz4
                   zic2xpm ~/ziics/fritz4.*

          3. Give XBoard the ``-pixmap'' option

                   xboard -pixmap ~/fritz4

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                                       $Date:

          (*) ZIICS is a separate copyrighted work of Andy McFarland.  The
          ``ZIICS pieces'' are copyrighted works of their respective creators.
          Files produced by ``zic2xpm'' are for PERSONAL USE ONLY and may NOT be
          redistributed without explicit permission from the original creator(s)
          of the pieces.

     COPYRIGHT
          Copyright (C) 1991 Digital Equipment Corporation, Maynard,
          Massachusetts.

          All Rights Reserved.

          Permission to use, copy, modify, and distribute this software and its
          documentation for any purpose and without fee is hereby granted,
          provided that the above copyright notice appear in all copies and that
          both that copyright notice and this permission notice appear in
          supporting documentation, and that the name of Digital not be used in
          advertising or publicity pertaining to distribution of the software
          without specific, written prior permission.

          Digital disclaims all warranties with regard to this software,
          including all implied warranties of merchantability and fitness.  In
          no event shall Digital be liable for any special, indirect or
          consequential damages or any damages whatsoever resulting from loss of
          use, data or profits, whether in an action of contract, negligence or
          other tortious action, arising out of or in connection with the use or
          performance of this software.

          Enhancements copyright (C) 1992-2003, 2004, 2005, 2006, 2007, 2008,
          2009, 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc.

          Published by the Free Software Foundation
          59 Temple Place - Suite 330
          Boston, MA 02111-1307 USA

          Permission is granted to make and distribute verbatim copies of this
          manual provided the copyright notice and this permission notice are
          preserved on all copies.

          Permission is granted to copy and distribute modified versions of this
          manual under the conditions for verbatim copying, provided also that
          the section entitled ``GNU General Public License,'' is included
          exactly as in the original, and provided that the entire resulting
          derived work is distributed under the terms of a permission notice
          identical to this one.

          Permission is granted to copy and distribute translations of this
          manual into another language, under the above conditions for modified
          versions, except that the section entitled ``GNU General Public
          License,'' and this permission notice, may be included in translations

                                       - 74 -        Formatted:  January 7, 2014

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          approved by the Free Software Foundation instead of in the original
          English.

     GNU GENERAL PUBLIC LICENSE
          Copyright (C) 2007 Free Software Foundation, Inc. `http://fsf.org/'

          Everyone is permitted to copy and distribute verbatim copies of this
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          The GNU General Public License is a free, copyleft license for
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          The licenses for most software and other practical works are designed
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          changed, so that their problems will not be attributed erroneously to
          authors of previous versions.

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          Some devices are designed to deny users access to install or run
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          systematic pattern of such abuse occurs in the area of products for
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          Finally, every program is threatened constantly by software patents.
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          could make it effectively proprietary.  To prevent this, the GPL
          assures that patents cannot be used to render the program non-free.

          The precise terms and conditions for copying, distribution and
          modification follow.

          Definitions.
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               To ``convey'' a work means any kind of propagation that enables
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               other parts of the work.

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                                       - 78 -        Formatted:  January 7, 2014

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                                       - 79 -        Formatted:  January 7, 2014

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                                       $Date:

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                                       - 82 -        Formatted:  January 7, 2014

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               relicensing or conveying under this License, you may add to a
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               If you add terms to a covered work in accord with this section,
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               Additional terms, permissive or non-permissive, may be stated in
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          Termination.
               You may not propagate or modify a covered work except as
               expressly provided under this License.  Any attempt otherwise to
               propagate or modify it is void, and will automatically terminate
               your rights under this License (including any patent licenses
               granted under the third paragraph of section 11).

               However, if you cease all violation of this License, then your
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               copyright holder fails to notify you of the violation by some
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               Moreover, your license from a particular copyright holder is
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               Termination of your rights under this section does not terminate
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          Acceptance Not Required for Having Copies.
               You are not required to accept this License in order to receive
               or run a copy of the Program.  Ancillary propagation of a covered

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               work occurring solely as a consequence of using peer-to-peer
               transmission to receive a copy likewise does not require
               acceptance.  However, nothing other than this License grants you
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               actions infringe copyright if you do not accept this License.
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               indicate your acceptance of this License to do so.

          Automatic Licensing of Downstream Recipients.
               Each time you convey a covered work, the recipient automatically
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               An ``entity transaction'' is a transaction transferring control
               of an organization, or substantially all assets of one, or
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               You may not impose any further restrictions on the exercise of
               the rights granted or affirmed under this License.  For example,
               you may not impose a license fee, royalty, or other charge for
               exercise of rights granted under this License, and you may not
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               any portion of it.

          Patents.
               A ``contributor'' is a copyright holder who authorizes use under
               this License of the Program or a work on which the Program is
               based.  The work thus licensed is called the contributor's
               ``contributor version''.

               A contributor's ``essential patent claims'' are all patent claims
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               infringed only as a consequence of further modification of the
               contributor version.  For purposes of this definition,
               ``control'' includes the right to grant patent sublicenses in a

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               manner consistent with the requirements of this License.

               Each contributor grants you a non-exclusive, worldwide, royalty-
               free patent license under the contributor's essential patent
               claims, to make, use, sell, offer for sale, import and otherwise
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               In the following three paragraphs, a ``patent license'' is any
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               If you convey a covered work, knowingly relying on a patent
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               particular work, or (3) arrange, in a manner consistent with the
               requirements of this License, to extend the patent license to
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               actual knowledge that, but for the patent license, your conveying
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               covered work in a country, would infringe one or more
               identifiable patents in that country that you have reason to
               believe are valid.

               If, pursuant to or in connection with a single transaction or
               arrangement, you convey, or propagate by procuring conveyance of,
               a covered work, and grant a patent license to some of the parties
               receiving the covered work authorizing them to use, propagate,
               modify or convey a specific copy of the covered work, then the
               patent license you grant is automatically extended to all
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               A patent license is ``discriminatory'' if it does not include
               within the scope of its coverage, prohibits the exercise of, or
               is conditioned on the non-exercise of one or more of the rights
               that are specifically granted under this License.  You may not
               convey a covered work if you are a party to an arrangement with a
               third party that is in the business of distributing software,
               under which you make payment to the third party based on the
               extent of your activity of conveying the work, and under which
               the third party grants, to any of the parties who would receive
               the covered work from you, a discriminatory patent license (a) in
               connection with copies of the covered work conveyed by you (or

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               copies made from those copies), or (b) primarily for and in
               connection with specific products or compilations that contain
               the covered work, unless you entered into that arrangement, or
               that patent license was granted, prior to 28 March 2007.

               Nothing in this License shall be construed as excluding or
               limiting any implied license or other defenses to infringement
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          No Surrender of Others' Freedom.
               If conditions are imposed on you (whether by court order,
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               to collect a royalty for further conveying from those to whom you
               convey the Program, the only way you could satisfy both those
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          Use with the GNU Affero General
               Notwithstanding any other provision of this License, you have
               permission to link or combine any covered work with a work
               licensed under version 3 of the GNU Affero General Public License
               into a single combined work, and to convey the resulting work.
               The terms of this License will continue to apply to the part
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          Revised Versions of this License.
               The Free Software Foundation may publish revised and/or new
               versions of the GNU General Public License from time to time.
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               Each version is given a distinguishing version number.  If the
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               Free Software Foundation.  If the Program does not specify a
               version number of the GNU General Public License, you may choose

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               any version ever published by the Free Software Foundation.

               If the Program specifies that a proxy can decide which future
               versions of the GNU General Public License can be used, that
               proxy's public statement of acceptance of a version permanently
               authorizes you to choose that version for the Program.

               Later license versions may give you additional or different
               permissions.  However, no additional obligations are imposed on
               any author or copyright holder as a result of your choosing to
               follow a later version.

          Disclaimer of Warranty.
               THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
               APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE
               COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS
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          Limitation of Liability.
               IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
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               BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
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          Interpretation of Sections 15 and 16.
               If the disclaimer of warranty and limitation of liability
               provided above cannot be given local legal effect according to
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               If you develop a new program, and you want it to be of the
               greatest possible use to the public, the best way to achieve this
               is to make it free software which everyone can redistribute and
               change under these terms.

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               To do so, attach the following notices to the program.  It is
               safest to attach them to the start of each source file to most
               effectively state the exclusion of warranty; and each file should
               have at least the ``copyright'' line and a pointer to where the
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               ONE LINE TO GIVE THE PROGRAM'S NAME AND A BRIEF IDEA OF WHAT IT DOES.
               Copyright (C) YEAR NAME OF AUTHOR

               This program is free software: you can redistribute it and/or modify
               it under the terms of the GNU General Public License as published by
               the Free Software Foundation, either version 3 of the License, or (at
               your option) any later version.

               This program is distributed in the hope that it will be useful, but
               WITHOUT ANY WARRANTY; without even the implied warranty of
               MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
               General Public License for more details.

               You should have received a copy of the GNU General Public License
               along with this program.  If not, see `http://www.gnu.org/licenses/'.

               Also add information on how to contact you by electronic and
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               If the program does terminal interaction, make it output a short
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               PROGRAM Copyright (C) YEAR NAME OF AUTHOR
               This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
               This is free software, and you are welcome to redistribute it
               under certain conditions; type `show c' for details.

               The hypothetical commands `show w' and `show c' should show the
               appropriate parts of the General Public License.  Of course, your
               program's commands might be different; for a GUI interface, you
               would use an ``about box''.

               You should also get your employer (if you work as a programmer)
               or school, if any, to sign a ``copyright disclaimer'' for the
               program, if necessary.  For more information on this, and how to
               apply and follow the GNU GPL, see `http://www.gnu.org/licenses/'.

               The GNU General Public License does not permit incorporating your
               program into proprietary programs.  If your program is a
               subroutine library, you may consider it more useful to permit
               linking proprietary applications with the library.  If this is
               what you want to do, use the GNU Lesser General Public License
               instead of this License.  But first, please read
               `http://www.gnu.org/philosophy/why-not-lgpl.html'.

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