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INFO-DIR-SECTION Games
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* xboard: (xboard).         An X Window System graphical chessboard.
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Introduction
************

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 4.4.0j of XBoard.

1 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.

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

2 Menus, buttons, and keys
**************************

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.  To drop a new piece on a square (when applicable),
press the middle or the right mouse button over the square and select
from the popup menu.  In cases where you can drop either a white or
black piece, use the middle button (or shift+right) for white and the
right button (or shift+middle) for black.  When you are playing a
bughouse game on an Internet Chess Server, a list of the offboard
pieces that each player has available is shown in the window title
after the player's name; in addition, the piece menus show the number
of pieces available of each type. From version 4.3.14 on, it is also
possible in crazyhouse, bughouse or shogi to dag and drop pieces to the
board from the holdings squares displayed next to the board.

   All other XBoard commands are available from the menu bar. The most
frequently used commands also have shortcut keys or on-screen buttons.

   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.  See
Iconize in *note Keys:: below if you have problems getting this feature
to work.

2.1 File Menu
=============

New Game
     Resets XBoard and the chess engine to the beginning of a new chess
     game. The `r' 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'.  *Note
     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).  The selected opening position will persistently be
     chosen on any following New Game command until you use this menu
     to select another. Selecting position number -1 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
     play, the ICS is responsible for deciding which variant will be
     played, and XBoard adapts autmatically.) 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, crazyhous, bughouse.

Load Game
     Plays a game from a record file. The `g' key is a keyboard
     equivalent.  A popup dialog prompts you for the file name. If the
     file contains more than one game, a second popup 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) are
     treated as comments; XBoard is not able to walk variation trees.
     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.  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.

Load Next Game
     Loads the next game from the last game record file you loaded.
     The shifted `N' key is a keyboard equivalent.

Load Previous Game
     Loads the previous game from the last game record file you loaded.
     The shifted `P' key is a keyboard equivalent.  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.

Save Game
     Appends a record of the current game to a file.  A popup 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.

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 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.

Paste Game
     Interprets the current X selection as a game record and loads it,
     as with Load Game.

Load Position
     Sets up a position from a position file.  A popup dialog prompts
     you for the file name. 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.

Load Previous Position
     Loads the previous position from the last position file you
     loaded.  Not available if the last position was loaded from a pipe.

Reload Same Position
     Reloads the last position you loaded.  Not available if the last
     position was loaded from a pipe.

Save Position
     Appends a diagram of the current position to a file.  A popup
     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.

Copy Position
     Copies the current position to an internal clipboard in FEN format
     and sets the X selection to the position text.  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.

Paste Position
     Interprets the current X selection as a FEN position and loads it,
     as with Load Position.

Mail Move
Reload CMail Message
     See *note CMail::.

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

2.2 Mode Menu
=============

Machine White
     Tells the chess engine to play White.

Machine Black
     Tells the chess engine to play Black.

Two Machines
     Plays a game between two chess engines.

Analysis Mode
     XBoard tells the chess engine to start analyzing the current
     game/position and shows you the analysis as you move pieces around.
     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.

     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 File
     This option lets you load a game from a file (PGN, XBoard format,
     etc.)  and analyze it. When you select this menu item, a popup
     window appears and asks for a filename to load.  If the file
     contains multiple games, another popup appears that lets you
     select which game you wish to analyze.  After a game is loaded,
     use the XBoard arrow buttons to step forwards/backwards through
     the game and watch the analysis.  Note: Some chess engines do not
     support Analysis mode.

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 *note 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.

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.

     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'.

     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.  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 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. You can set the side to play next by clicking on
     the word White or Black at the top of the screen.  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.)

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
     autoplayed.  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.

Show Game List
     Shows or hides the list of games generated by the last `Load Game'
     command.

Show Move History
     Shows or hides a list of moves of the current game.  This list
     allows you to move the display to any earlier position in the game
     by clicking on the corresponding move.

Show Engine Output
     Shows or hides a window in which the thinking output of any loaded
     engines is displayed.

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"]
          [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', `Forward',
     and `Backward'.

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.

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 `p' 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 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.

2.3 Action Menu
===============

Accept
     Accepts a pending match offer. 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.). 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. You can also call your
     opponent's flag by clicking on his clock or by pressing the
     keyboard `t' key.

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 `d' 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.

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

Resign
     Resigns the game to your opponent. The shifted `R' 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.

Stop Examining
     Ends your participation in examining a game, by issuing the ICS
     unexamine command. ICS mode only.

2.4 Step Menu
=============

Backward
     Steps backward through a series of remembered moves.  The `[<]'
     button and the `b' 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 `f' 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 shifted `B' 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 `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, `Back to Start' only
     backs up your local view.

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

     If you are examining an ICS game, the behavior of `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.

Revert
     If you are examining an ICS game and Pause mode is off, issues the
     ICS command `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.

Move Now
     Forces the chess engine to move immediately. Chess engine mode
     only.

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.

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,
     repsectively.  The PGN file of the game will accompany the result
     string by the comment "user adjudication".

2.5 Options 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 `v' key is a keyboard equivalent.

Adjudications
     Pops up a sub-menu where you can enable or disable various
     adjudications that XBoard can perform in engine-engine games.  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 posititions
     which can never be won for lack of mating material, (e.g. KBK), or
     which are impossble 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 insruct XBoard to
     enforce a 50-move or 3-fold-repeat rule and automtically 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 cosecutive 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 faclitate the
     latter, you can inform xboard here if the engines report scores
     from the viewpoint of white, or from that of their own color.

Engine Settings
     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 tht allows setting of these parameters on
     engines is new since XBoard 4.3.15, so not many 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.

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

Always Queen
     If this option is off, XBoard brings up a dialog box whenever you
     move a pawn to the last rank, asking what piece you want to
     promote it to. If the option is true, your pawns are always
     promoted to queens. Your opponent can still underpromote.

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.

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 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.  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 the
     bottom of the window towards the top.

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.
     *Note Load and Save 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.

Flash Moves
     If this option is on, whenever a move is completed, the moved
     piece flashes.  The number of times to flash is set by the
     flashCount command-line option; it defaults to 3 if Flash Moves is
     first turned on from the menu.

     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. *Note User interface options::.

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).

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.

Move Sound
     If this option is on, XBoard alerts you by playing a 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.
     By default, the sound is the terminal bell, but on some systems
     you can change it to a sound file using the soundMove option; see
     below.

     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 *note ICS options::.)

ICS Alarm
     When this option is on, an alarm sound is played when your clock
     counts down to the icsAlarmTime (by default, 5 seconds) in an ICS
     game.  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.

Old Save Style
     If this option is off, XBoard saves games in PGN (portable game
     notation) and positions in FEN (Forsythe-Edwards notation).  If
     the option is on, a save style that is compatible with older
     versions of XBoard is used instead.  The old position style is
     more human-readable than FEN; the old game style has no particular
     advantages.

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.

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.

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

Premove
     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.

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.

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

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.

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.  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.)

2.6 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.  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.

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.

About XBoard
     Shows the current XBoard version number.

2.7 Other Shortcut Keys
=======================

Iconize
     Pressing the `i' or `c' key iconizes XBoard. The graphical icon
     displays a white knight if it is White's move, or a black knight
     if it is Black's move. If your X window manager displays only text
     icons, not graphical ones, check its documentation; there is
     probably a way to enable graphical icons.  If you get black and
     white reversed, we would like to hear about it; see *note
     Problems:: below for instructions on how to report this problem.

   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:

     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, Iconify, 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.

3 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 setting them as X resources (typically in
your `.Xresources' file).  Many of the options cannot be changed while
XBoard is running; others set the initial state of items that can be
changed with the *note 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.

   Each option corresponds to an X resource with the same name, so if
you like, you can set options in your `.Xresources' file or in a file
named `XBoard' in your home directory.  For options that have two
names, the longer one is the name of the corresponding X resource; the
short name is not recognized.  To turn a boolean option on or off as an
X resource, give its long name followed by the value true or false
(`XBoard*longOptionName: true').

3.1 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 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. *Note Options Menu::. Default:
     true.  (Relaces 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. *Note 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. *Note Options Menu::.
     Default: true.

-smpCores number
     Specifies the maxmum nmber of CPUs an SMP engine is allowed to use.
     Only works for engines that support the 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 `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'.

-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.)

-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
-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. It is easier to set the option from your
     `.Xresources' file; in that case you can include the character
     sequence `\n' in the string, and it will be converted to a newline.

     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
     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
     WinBoard (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 the options announced by the engine at startup
     through the feature commands of 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 WinBoard would normally omit them (string = "- -"), or to
     add variant-specific fields that are not yet supported by WinBoard
     (e.g. to indicate the number of checks in 3check).

3.2 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 through a .ini temporary file ceated for the
     purpose.

-PolyglotDir filename
     Gives the name of the directory in which the Polyglot adapter for
     UCI engines expects its files.  Default:
     "/usr/local/share/polyglot".

-usePolyglotBook true/false
     Specifies if the Polygot book should be used.

-PolyglotBook filename
     Gives the filename of the opening book that Polyglot should use.
     From XBoard 4.3.15 on, native WinBoard engines will also use the
     opening book specified here, provided 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: false.

-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
     setting of WinBoard engines, for those that support the memory
     feature of 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 WinBoard engines, for those that support the memory
     feature of 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: "".

3.3 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
     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.
     *Note 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.  *Note
     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.
     *Note 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 dialup 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.

          #!/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 *note
     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. *Note Mode Menu::. Default:
     false.

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

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

-autobs/-xautobs or -autoObserve true/false
     Sets the Auto Observe menu option.  *Note 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 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.

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

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

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

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

-pre/-xpre \fRor\fB -premove true/false
     Sets the Premove menu option. *Note Options Menu::. Default: true.

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

-colorizeMessages or -colorize
     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.

-colorShout foreground,background,bold
-colorSShout 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, 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.

     Here is an example of how to set the colors in your `.Xresources'
     file.  The colors shown here are the default values; you will get
     them if you turn `-colorize' on without specifying your own colors.

          xboard*colorizeMessages: true
          xboard*colorShout: green
          xboard*colorSShout: green, black, 1
          xboard*colorChannel1: cyan
          xboard*colorChannel: cyan, black, 1
          xboard*colorKibitz: magenta, black, 1
          xboard*colorTell: yellow, black, 1
          xboard*colorChallenge: red, black, 1
          xboard*colorRequest: red
          xboard*colorSeek: blue
          xboard*colorNormal: default

-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.

-soundShout filename
-soundSShout filename
-soundChannel 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.

-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).

-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).

     Here is an example of how to set the sounds in your `.Xresources'
     file:

          xboard*soundShout: shout.wav
          xboard*soundSShout: sshout.wav
          xboard*soundChannel1: channel1.wav
          xboard*soundChannel: channel.wav
          xboard*soundKibitz: kibitz.wav
          xboard*soundTell: tell.wav
          xboard*soundChallenge: challenge.wav
          xboard*soundRequest: request.wav
          xboard*soundSeek: seek.wav
          xboard*soundMove: move.wav
          xboard*soundIcsWin: win.wav
          xboard*soundIcsLoss: lose.wav
          xboard*soundIcsDraw: draw.wav
          xboard*soundIcsUnfinished: unfinished.wav
          xboard*soundIcsAlarm: alarm.wav

3.4 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'. 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.  *Note Options Menu::.  Default:
     false.  Ignored if `saveGameFile' is set.

-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, WinBoard 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".

-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.

-oldsave/-xoldsave or -oldSaveStyle true/false
     Sets the Old Save Style menu option.  *Note 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
     Elo, b=black Elo, t=time control, v=variant, a=out-of-book info.
     Default: "eprd"

3.5 User interface options
==========================

-display
-geometry
-iconic
     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.

-movesound/-xmovesound or -ringBellAfterMoves true/false
     Sets the Move Sound menu option.  *Note 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.  *Note Options Menu::.
     Default: true.

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

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

-legal/-xlegal or -testLegality true/false
     Sets the Test Legality menu option.  *Note 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.  Pieces of all these
     sizes are built into XBoard.  Other sizes can be used if you have
     them; see the pixmapDirectory and bitmapDirectory options.  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 default font, `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.

-coords/-xcoords or -showCoords true/false
     Sets the Show Coords menu option.  *Note 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.  *Note Options Menu::.
     Default: true.

-autoflip/-xautoflip or -autoFlipView true/false
     Sets the Auto Flip View menu option.  *Note 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 *note 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.

-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.

-flashCount count
-flashRate rate
-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. *Note Options Menu::.
     Default: false.

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

-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-*-*-*-*-*-*-*-*.

-font 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.

-bm or -bitmapDirectory dir
-pixmap or -pixmapDirectory dir
     These options control what piece images xboard uses.  The XBoard
     distribution includes one set of pixmap pieces in xpm format, in
     the directory `pixmaps', and one set of bitmap pieces in xbm
     format, in the directory `bitmaps'.  Pixmap pieces give a better
     appearance on the screen: the white pieces have dark borders, and
     the black pieces have opaque internal details.  With bitmaps,
     neither piece color has a border, and the internal details are
     transparent; you see the square color or other background color
     through them.

     If XBoard is configured and compiled on a system that includes
     libXpm, the X pixmap library, the xpm pixmap pieces are compiled
     in as the default.  A different xpm piece set can be selected at
     runtime with the `pixmapDirectory' option, or a bitmap piece set
     can be selected with the `bitmapDirectory' option.

     If XBoard is configured and compiled on a system that does not
     include libXpm (or the `--disable-xpm' option is given to the
     configure program), the bitmap pieces are compiled in as the
     default.  It is not possible to use xpm pieces in this case, but
     pixmap pieces in another format called "xim" can be used by giving
     the `pixmapDirectory' option.  Or again, a different bitmap piece
     set can be selected with the `bitmapDirectory' option.

     Files in the `bitmapDirectory' must be named as follows: The first
     character of a piece bitmap name gives the piece it represents
     (`p', `n', `b', `r', `q', or `k'), the next characters give the
     size in pixels, the following character indicates whether the
     piece is solid or outline (`s' or `o'), and the extension is `.bm'.
     For example, a solid 80x80 knight would be named `n80s.bm'.  The
     outline bitmaps are used only in monochrome mode.  If bitmap
     pieces are compiled in and the bitmapDirectory is missing some
     files, the compiled in pieces are used instead.

     If the bitmapDirectory option is given, it is also possible to
     replace xboard's icons and menu checkmark, by supplying files
     named `icon_white.bm', `icon_black.bm', and `checkmark.bm'.

     For more information about pixmap pieces and how to get additional
     sets, see *note zic2xpm:: below.

-whitePieceColor color
-blackPieceColor color
-lightSquareColor color
-darkSquareColor color
-highlightSquareColor 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
          -highlightSquareColor  gray100
          -premoveHighlightColor gray70
          -lowTimeWarningColor   gray70

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

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

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

3.6 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
     adjudiction)

-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.
     Defaut: 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!

3.7 Other options
=================

-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.

-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)
          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 intermedite 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)
          fairy         A catchall variant in which all piece types
                        known to XBoard can participate (8x8)
          unknown       Catchall for other unknown variants

     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 (offboard
     interposition on mate), losers, suicide, giveaway, atomic, and
     3check are not fully understood.  Berolina and cylinder chess can
     only be played with legality testing off.  In crazyhouse, XBoard
     now does keep track of offboard 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

-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

-pieceToSquareTable 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: ""

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

-debugFile filename or -nameOfDebugFile filename
     Sets the name of the file to which WinBoard saves debug information
     (including all communication to and from the engines).

-engineDebugOutput number
     Specifies how WinBoard 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, WinBoard 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 WinBoard has to wait before sending
     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.


4 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
*note 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.  *note 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 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. *Note 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.)

`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 *note
Step Menu::, *note Mode Menu::, and *note Options Menu::.

5 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 *note 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
   Or in your `.Xresources' file:

     XBoard*internetChessServerHost: firewall.example.com
     XBoard*internetChessServerPort: 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 `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

Or in your `.Xresources' file:

     XBoard*gateway: rsh.example.com
     XBoard*internetChessServerHost: 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

Or in your `.Xresources' file:

     XBoard*useTelnet: true
     XBoard*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, or add `XBoard*internetChessServerPort:' to your
`.Xresources' file.  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 ""

Or in your `.Xresources' file:

     XBoard*useTelnet: true
     XBoard*telnetProgram: ptelnet
     XBoard*internetChessServerHost: foo.edu
     XBoard*internetChessServerPort:

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.

   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/.

6 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.

7 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, WinBoard 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
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.  Edit Position mode does not
allow you to edit the crazyhouse holdings properly.  You cannot drag
pieces to the holding, and using the popup menu to put pieces there
does not adapt the holding counts and leads to an inconsistent state.
Set up crazyhouse positions by loading / pasting a bFEN, from there you
can set 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.

8 Reporting problems
********************

Report bugs and problems with XBoard to `<bug-xboard@gnu.org>'.

   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.
Here is a sample of approximately what you should type:

     script
     uname -a
     ./configure
     make
     ./xboard -debug
     exit
     mail bug-xboard@gnu.org
     Subject: Your short description of the problem
     Your detailed description of the problem
     ~r typescript
     .

   The WinBoard / XBoard 4.3 line is being developed by H.G. Muller
independently of the GNU Savannah xboard project.  Bug reports on this
version, and suggestions for improvements and additions, are best
posted in the WinBoard forum, WinBoard-development section
(http://www.open-aurec.com/wbforum).

   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.  Also see our Web site at
http://savannah.gnu.org/projects/xboard/.

9 Authors and contributors
**************************

Tim Mann has been responsible for XBoard versions 1.3 and beyond, and
for WinBoard, a port of XBoard to Microsoft Win32 (Windows NT and
Windows 95). H.G.Muller is responsible for version 4.3.

   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.

   Hugh Fisher added animated piece movement to XBoard, and Henrik Gram
(henrikg@funcom.com) added it to WinBoard.  Frank McIngvale added
click/click moving, the Analysis modes, piece flashing, ZIICS import,
and ICS text colorization to XBoard.  Jochen Wiedmann ported XBoard to
the Amiga, creating AmyBoard, and converted the documentation to
texinfo.  Elmar Bartel contributed the new piece bitmaps introduced in
version 3.2.  John Chanak contributed the initial implementation of ICS
mode.  The color scheme and the old 80x80 piece bitmaps were taken from
Wayne Christopher's `XChess' program.

   Chris Sears and Dan Sears wrote the original XBoard.  They were
responsible for versions 1.0 through 1.2.

   Evan Welsh wrote `CMail'.  Patrick Surry helped in designing,
testing, and documenting CMail.

   Allessandro 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 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 wre WinBoard only have now been
back-ported to XBoard.

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

   Arun Persaud worked with H.G. Muller to combine all the features of
the never-released WinBoard 4.2.8 of the Savannah project (mainly by
Daniel Mehrmann), and the never-released 4.3.16 into a unified WinBoard
4.4, which is now available both from the Savannah web site and the
WinBoard forum.

10 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.

10.1 CMail options
==================

-h
     Displays `cmail' usage information.

-c
     Shows the conditions of the GNU General Public License.  *Note
     Copying::.

-w
     Shows the warranty notice of the GNU General Public License.
     *Note 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>
-name <full name>
-oppname <full name>
     The full name of White, Black, yourself or your opponent.

-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.

-gamesFile <file>
     A file containing a list of games with email addresses. This
     defaults to the environment variable `$CMAIL_GAMES' or failing that
     `.cmailgames'.

-aliasesFile <file>
     A file containing one or more aliases for a set of email
     addresses. This defaults to the environment variable
     `$CMAIL_ALIASES' or failing that `.cmailaliases'.

-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.  *Note Options::.

10.2 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. *Note 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.

10.3 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. *Note 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.

10.4 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.

10.5 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.

   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.

10.6 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.

11 Other programs you can use with XBoard
*****************************************

Here are some other programs you can use with XBoard

11.1 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.

11.2 Fairy-Max
==============

Fairy-Max is a derivative from the 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 lage number of variants, normal Chess being one of
those.  In addition it plas 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

11.3 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

11.4 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.

11.5 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 set of pieces to XBoard format.
     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 when starting up, e.g.:
          xboard -pixmap ~/fritz4

     Alternatively, you can add this line to your `.Xresources' file:

          xboard*pixmapDirectory: ~/fritz4

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

GNU GENERAL PUBLIC LICENSE
**************************

                        Version 3, 29 June 2007

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

     Everyone is permitted to copy and distribute verbatim copies of this
     license document, but changing it is not allowed.

Preamble
========

The GNU General Public License is a free, copyleft license for software
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TERMS AND CONDITIONS
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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
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     was granted, prior to 28 March 2007.

     Nothing in this License shall be construed as excluding or limiting
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 12. No Surrender of Others' Freedom.

     If conditions are imposed on you (whether by court order,
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 13. Use with the GNU Affero General Public License.

     Notwithstanding any other provision of this License, you have
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 14. Revised Versions of this License.

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 15. Disclaimer of Warranty.

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END OF TERMS AND CONDITIONS
===========================

How to Apply These Terms to Your New Programs
=============================================

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     ONE LINE TO GIVE THE PROGRAM'S NAME AND A BRIEF IDEA OF WHAT IT DOES.
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Index
*****

-animateSpeed, option:                         See 3.5.      (line 1803)
.cmailaliases:                                 See 10.1.     (line 2492)
.cmailgames:                                   See 10.1.     (line 2487)
.icsrc:                                        See 3.3.      (line 1315)
<, Button:                                     See 2.4.      (line  459)
<<, Button:                                    See 2.4.      (line  492)
>, Button:                                     See 2.4.      (line  479)
>>, Button:                                    See 2.4.      (line  511)
abort, ICS command:                            See 4.        (line 2093)
Abort, Menu Item:                              See 2.3.      (line  439)
About XBoard, Menu Item:                       See 2.6.      (line  840)
accept, ICS command:                           See 4.        (line 2080)
Accept, Menu Item:                             See 2.3.      (line  414)
Action, Menu:                                  See 2.3.      (line  413)
adjourn, ICS command:                          See 4.        (line 2093)
Adjourn, Menu Item:                            See 2.3.      (line  435)
Adjudicate Draw, Menu Item:                    See 2.4.      (line  545)
Adjudicate to Black, Menu Item:                See 2.4.      (line  545)
Adjudicate to White, Menu Item:                See 2.4.      (line  545)
adjudicateDrawMoves, option:                   See 3.6.      (line 1818)
adjudicateLossThreshold, option:               See 3.6.      (line 1810)
Adjudications, Menu Item:                      See 2.5.      (line  559)
alarm, option:                                 See 3.3.      (line 1358)
Always Queen, Menu Item:                       See 2.5.      (line  604)
alwaysPromoteToQueen, option:                  See 3.5.      (line 1599)
Analysis Mode, Menu Item:                      See 2.2.      (line  238)
Analyze File, Menu Item:                       See 2.2.      (line  259)
Animate Dragging, Menu Item:                   See 2.5.      (line  610)
Animate Moving, Menu Item:                     See 2.5.      (line  617)
animate, option:                               See 3.5.      (line 1799)
animateDragging, option:                       See 3.5.      (line 1795)
animateMoving, option:                         See 3.5.      (line 1799)
Authors:                                       See 9.        (line 2346)
Auto Comment, Menu Item:                       See 2.5.      (line  625)
Auto Flag, Menu Item:                          See 2.5.      (line  633)
Auto Flip View, Menu Item:                     See 2.5.      (line  642)
Auto Observe, Menu Item:                       See 2.5.      (line  647)
Auto Raise Board, Menu Item:                   See 2.5.      (line  660)
Auto Save, Menu Item:                          See 2.5.      (line  665)
autobs, option:                                See 3.3.      (line 1342)
autoCallFlag, option:                          See 3.3.      (line 1338)
autocomm, option:                              See 3.3.      (line 1334)
autoComment, option:                           See 3.3.      (line 1334)
autoflag, option:                              See 3.3.      (line 1338)
autoflip, option:                              See 3.5.      (line 1645)
autoFlipView, option:                          See 3.5.      (line 1645)
autoKibitz, option:                            See 3.3.      (line 1346)
autoObserve, option:                           See 3.3.      (line 1342)
autoraise, option:                             See 3.5.      (line 1641)
autoRaiseBoard, option:                        See 3.5.      (line 1641)
autosave, option:                              See 3.4.      (line 1523)
autoSaveGames, option:                         See 3.4.      (line 1523)
Back to Start, Menu Item:                      See 2.4.      (line  492)
Backward, Menu Item:                           See 2.4.      (line  459)
bell, option:                                  See 3.5.      (line 1586)
bitmapDirectory, option:                       See 3.5.      (line 1726)
blackPieceColor, option:                       See 3.5.      (line 1773)
blind, option:                                 See 3.5.      (line 1693)
Blindfold, Menu Item:                          See 2.5.      (line  672)
blindfold, option:                             See 3.5.      (line 1693)
bm, option:                                    See 3.5.      (line 1726)
board size:                                    See 3.5.      (line 1607)
boardHeight, option:                           See 3.7.      (line 1930)
boardSize, option:                             See 3.5.      (line 1607)
boardWidth, option:                            See 3.7.      (line 1935)
Book, Menu Item:                               See 2.6.      (line  830)
Bug reports:                                   See 8.        (line 2312)
Bugs <1>:                                      See 8.        (line 2312)
Bugs:                                          See 7.        (line 2252)
buttons, option:                               See 3.5.      (line 1667)
Call Flag, Menu Item:                          See 2.3.      (line  424)
checkMates, option:                            See 3.6.      (line 1823)
Chess engine options:                          See 3.1.      (line  917)
CHESSDIR:                                      See 6.        (line 2243)
clock, option:                                 See 3.1.      (line  934)
clockFont, option:                             See 3.5.      (line 1697)
clockMode, option:                             See 3.1.      (line  934)
cmail:                                         See 10.       (line 2397)
colorChallenge, option:                        See 3.3.      (line 1391)
colorChannel, option:                          See 3.3.      (line 1391)
colorChannel1, option:                         See 3.3.      (line 1391)
colorize, option:                              See 3.3.      (line 1377)
colorKibitz, option:                           See 3.3.      (line 1391)
colorNormal, option:                           See 3.3.      (line 1391)
colorRequest, option:                          See 3.3.      (line 1391)
Colors <1>:                                    See 3.5.      (line 1773)
Colors:                                        See 3.3.      (line 1377)
colorSeek, option:                             See 3.3.      (line 1391)
colorShout, option:                            See 3.3.      (line 1391)
colorSShout, option:                           See 3.3.      (line 1391)
colorTell, option:                             See 3.3.      (line 1391)
Contributors:                                  See 9.        (line 2346)
coordFont, option:                             See 3.5.      (line 1703)
coords, option:                                See 3.5.      (line 1637)
Copy Game, Menu Item:                          See 2.1.      (line  166)
Copy Position, Menu Item:                      See 2.1.      (line  206)
darkSquareColor, option:                       See 3.5.      (line 1773)
debug, option:                                 See 3.7.      (line 1981)
debugFile, option:                             See 3.7.      (line 1984)
debugMode, option:                             See 3.7.      (line 1981)
decline, ICS command:                          See 4.        (line 2080)
Decline, Menu Item:                            See 2.3.      (line  419)
defaultCacheSizeEGTB, option:                  See 3.2.      (line 1196)
defaultFrcPosition, option:                    See 3.7.      (line 1950)
defaultHashSize, option:                       See 3.2.      (line 1190)
defaultPathEGTB, option:                       See 3.2.      (line 1202)
delayAfterQuit, option:                        See 3.7.      (line 2016)
delayBeforeQuit, option:                       See 3.7.      (line 2016)
display, option:                               See 3.5.      (line 1577)
drag, option:                                  See 3.5.      (line 1795)
draw, ICS command:                             See 4.        (line 2093)
Draw, Menu Item:                               See 2.3.      (line  430)
Edit Comment, Menu Item:                       See 2.2.      (line  375)
Edit Game, Menu Item:                          See 2.2.      (line  293)
Edit Position, Menu Item:                      See 2.2.      (line  309)
Edit Tags, Menu Item:                          See 2.2.      (line  351)
egtFormats, option:                            See 3.2.      (line 1206)
Engine Settings:                               See 3.2.      (line 1157)
engineDebugOutput, option:                     See 3.7.      (line 1988)
Environment variables:                         See 6.        (line 2243)
examine, ICS command:                          See 4.        (line 2116)
Exit, Menu Item:                               See 2.1.      (line  223)
exit, option:                                  See 3.5.      (line 1591)
fb, option:                                    See 3.1.      (line 1040)
fcp, option:                                   See 3.1.      (line 1033)
fd, option:                                    See 3.1.      (line 1055)
fh, option:                                    See 3.1.      (line 1047)
File Menu:                                     See 2.1.      (line   82)
finger, ICS command:                           See 4.        (line 2103)
firstChessProgram, option:                     See 3.1.      (line 1033)
firstComputerString, option:                   See 3.1.      (line 1091)
firstDirectory, option:                        See 3.1.      (line 1055)
firstHasOwnBookUCI, option:                    See 3.2.      (line 1185)
firstHost, option:                             See 3.1.      (line 1047)
firstIsUCI, option:                            See 3.2.      (line 1159)
firstNeedsNoncompliantFEN, option:             See 3.1.      (line 1141)
firstNPS, option:                              See 3.1.      (line  957)
firstOptions, option:                          See 3.1.      (line 1130)
firstPlaysBlack, option:                       See 3.1.      (line 1040)
firstProtocolVersion, option:                  See 3.1.      (line 1108)
firstScoreAbs, option:                         See 3.1.      (line 1116)
firstTimeOdds, option:                         See 3.1.      (line  975)
firstXBook, option:                            See 3.2.      (line 1185)
Flash Moves, Menu Item:                        See 2.5.      (line  678)
flash, option:                                 See 3.5.      (line 1680)
flashCount, option:                            See 3.5.      (line 1680)
flashRate, option:                             See 3.5.      (line 1680)
Flip View, Menu Item:                          See 2.5.      (line  554)
flip, option:                                  See 3.5.      (line 1649)
flipView, option:                              See 3.5.      (line 1649)
fNoOwnBookUCI, option:                         See 3.2.      (line 1185)
Font:                                          See 3.5.      (line 1710)
Font, clock:                                   See 3.5.      (line 1697)
Font, coordinates:                             See 3.5.      (line 1703)
font, option:                                  See 3.5.      (line 1710)
fontSizeTolerance, option:                     See 3.5.      (line 1716)
Forward to End, Menu Item:                     See 2.4.      (line  511)
Forward, Menu Item:                            See 2.4.      (line  479)
fUCI, option:                                  See 3.2.      (line 1159)
gameListTags, option:                          See 3.4.      (line 1565)
games, ICS command:                            See 4.        (line 2069)
gateway, option:                               See 3.3.      (line 1265)
geometry, option:                              See 3.5.      (line 1577)
Get Move List, Menu Item:                      See 2.5.      (line  692)
getMoveList, option:                           See 3.3.      (line 1354)
Help Menu:                                     See 2.6.      (line  812)
help, ICS command:                             See 4.        (line 2054)
Hide Thinking, Menu Item:                      See 2.5.      (line  789)
Highlight Last Move, Menu Item:                See 2.5.      (line  704)
highlight, option:                             See 3.5.      (line 1689)
highlightLastMove, option:                     See 3.5.      (line 1689)
highlightSquareColor, option:                  See 3.5.      (line 1773)
Hint, Menu Item:                               See 2.6.      (line  827)
holdingsSize, option:                          See 3.7.      (line 1942)
iconic, option:                                See 3.5.      (line 1577)
ICS:                                           See 4.        (line 2025)
ICS Alarm, Menu Item:                          See 2.5.      (line  725)
ICS Client, Menu Item:                         See 2.2.      (line  269)
ICS Input Box, Menu Item:                      See 2.2.      (line  380)
ICS options:                                   See 3.3.      (line 1220)
ICS, addresses:                                See 4.        (line 2025)
ics, option:                                   See 3.3.      (line 1221)
icsAlarm, option:                              See 3.3.      (line 1358)
icsAlarmTime, option:                          See 3.3.      (line 1362)
icscomm, option:                               See 3.3.      (line 1273)
icshelper, option:                             See 3.3.      (line 1239)
icshost, option:                               See 3.3.      (line 1226)
icsinput, option:                              See 3.3.      (line 1330)
icslogon, option:                              See 3.3.      (line 1315)
icsport, option:                               See 3.3.      (line 1235)
inc, option:                                   See 3.1.      (line  927)
Info XBoard, Menu Item:                        See 2.6.      (line  813)
initalMode, option:                            See 3.7.      (line 1875)
initString, option:                            See 3.1.      (line 1064)
Internet Chess Server:                         See 4.        (line 2025)
internetChessServerCommPort, option:           See 3.3.      (line 1273)
internetChessServerHelper, option:             See 3.3.      (line 1239)
internetChessServerHost, option:               See 3.3.      (line 1226)
internetChessServerInputBox, option:           See 3.3.      (line 1330)
internetChessServerLogonScript, option:        See 3.3.      (line 1315)
internetChessServerMode, option:               See 3.3.      (line 1221)
internetChessServerPort, option:               See 3.3.      (line 1235)
introduction:
          See ``Introduction''.                              (line    9)
Keys:                                          See 2.7.      (line  845)
legal, option:                                 See 3.5.      (line 1603)
lgf, option:                                   See 3.4.      (line 1487)
lgi, option:                                   See 3.4.      (line 1487)
lightSquareColor, option:                      See 3.5.      (line 1773)
Limitations:                                   See 7.        (line 2252)
Load and Save options:                         See 3.4.      (line 1485)
Load Game, Menu Item:                          See 2.1.      (line  114)
Load Next Game, Menu Item:                     See 2.1.      (line  141)
Load Next Position, Menu Item:                 See 2.1.      (line  187)
Load Position, Menu Item:                      See 2.1.      (line  179)
Load Previous Game, Menu Item:                 See 2.1.      (line  145)
Load Previous Position, Menu Item:             See 2.1.      (line  190)
loadGameFile, option:                          See 3.4.      (line 1487)
loadGameIndex, option:                         See 3.4.      (line 1487)
loadPositionFile, option:                      See 3.4.      (line 1528)
loadPositionIndex, option:                     See 3.4.      (line 1528)
lowTimeWarning, option:                        See 3.3.      (line 1366)
lowTimeWarningColor, option:                   See 3.5.      (line 1773)
lpf, option:                                   See 3.4.      (line 1528)
lpi, option:                                   See 3.4.      (line 1528)
Machine Black, Menu Item:                      See 2.2.      (line  232)
Machine White, Menu Item:                      See 2.2.      (line  229)
Mail Move, Menu Item:                          See 2.1.      (line  220)
Major modes:                                   See 1.        (line   19)
Man XBoard, Menu Item:                         See 2.6.      (line  820)
matchGames, option:                            See 3.1.      (line 1011)
matchMode, option:                             See 3.1.      (line 1023)
materialDraws, option:                         See 3.6.      (line 1835)
Menu, Action:                                  See 2.3.      (line  413)
Menu, File:                                    See 2.1.      (line   82)
Menu, Help:                                    See 2.6.      (line  812)
Menu, Mode:                                    See 2.2.      (line  228)
Menu, Options:                                 See 2.5.      (line  553)
Menu, Step:                                    See 2.4.      (line  458)
Menus:                                         See 2.        (line   57)
mg, option:                                    See 3.1.      (line 1011)
mm, option:                                    See 3.1.      (line 1023)
Mode Menu:                                     See 2.2.      (line  228)
mode, option:                                  See 3.7.      (line 1875)
mono, option:                                  See 3.5.      (line 1673)
monoMode, option:                              See 3.5.      (line 1673)
Move Now, Menu Item:                           See 2.4.      (line  532)
Move Sound, Menu Item:                         See 2.5.      (line  710)
moves, option:                                 See 3.3.      (line 1354)
movesound, option:                             See 3.5.      (line 1586)
movesPerSession, option:                       See 3.1.      (line  923)
mps, option:                                   See 3.1.      (line  923)
msLoginDelay, option:                          See 3.3.      (line 1324)
nameOfDebugFile, option:                       See 3.7.      (line 1984)
ncp, option:                                   See 3.7.      (line 1870)
New Game, Menu Item:                           See 2.1.      (line   83)
New Shuffle Game, Menu Item:                   See 2.1.      (line   92)
New variant, Menu Item:                        See 2.1.      (line  105)
niceEngines, option:                           See 3.1.      (line 1122)
noChessProgram, option:                        See 3.7.      (line 1870)
noGUI, option:                                 See 3.5.      (line 1580)
observe, ICS command:                          See 4.        (line 2112)
Old Save Style, Menu Item:                     See 2.5.      (line  734)
oldmoves, ICS command:                         See 4.        (line 2116)
oldsave, option:                               See 3.4.      (line 1561)
oldSaveStyle, option:                          See 3.4.      (line 1561)
Options:                                       See 3.        (line  891)
Options Menu:                                  See 2.5.      (line  553)
Options, adjudication:                         See 3.6.      (line 1809)
options, Chess engine:                         See 3.1.      (line  917)
Options, ICS:                                  See 3.3.      (line 1220)
Options, Load and Save:                        See 3.4.      (line 1485)
Options, miscellaneous:                        See 3.7.      (line 1869)
Options, User interface:                       See 3.5.      (line 1574)
Other programs:                                See 11.       (line 2605)
Paste Game, Menu Item:                         See 2.1.      (line  175)
Paste Position, Menu Item:                     See 2.1.      (line  215)
Pause, Menu Item:                              See 2.2.      (line  387)
Periodic Updates, Menu Item:                   See 2.5.      (line  742)
pgnEventHeader, option`:                       See 3.4.      (line 1553)
pgnExtendedInfo, option`:                      See 3.4.      (line 1548)
pieceToSquareTable, option:                    See 3.7.      (line 1955)
pixmap, option:                                See 3.5.      (line 1726)
pixmapDirectory, option:                       See 3.5.      (line 1726)
PolyglotBook, option:                          See 3.2.      (line 1174)
PolyglotDir, option:                           See 3.2.      (line 1166)
Ponder Next Move, Menu Item:                   See 2.5.      (line  748)
ponder, option:                                See 3.1.      (line 1002)
ponderNextMove, option:                        See 3.1.      (line 1002)
Popup Exit Message, Menu Item:                 See 2.5.      (line  753)
Popup Move Errors, Menu Item:                  See 2.5.      (line  759)
popup, option:                                 See 3.5.      (line 1595)
popupExitMessage, option:                      See 3.5.      (line 1591)
popupMoveErrors, option:                       See 3.5.      (line 1595)
pre, option:                                   See 3.3.      (line 1370)
Premove, Menu Item:                            See 2.5.      (line  768)
premove, option:                               See 3.3.      (line 1370)
Problems:                                      See 8.        (line 2312)
queen, option:                                 See 3.5.      (line 1599)
Quiet Play, Menu Item:                         See 2.5.      (line  779)
quiet, option:                                 See 3.3.      (line 1373)
quietPlay, option:                             See 3.3.      (line 1373)
Reload CMail Message, Menu Item:               See 2.1.      (line  220)
Reload Same Game, Menu Item:                   See 2.1.      (line  150)
Reload Same Position, Menu Item:               See 2.1.      (line  194)
remoteShell, option:                           See 3.7.      (line 2002)
remoteUser, option:                            See 3.7.      (line 2007)
Reporting bugs:                                See 8.        (line 2312)
Reporting problems:                            See 8.        (line 2312)
Resign, Menu Item:                             See 2.3.      (line  444)
Retract Move, Menu Item:                       See 2.4.      (line  536)
reuse, option:                                 See 3.1.      (line 1099)
reuse2, option:                                See 3.1.      (line 1099)
reuseFirst, option:                            See 3.1.      (line 1099)
reuseSecond, option:                           See 3.1.      (line 1099)
Revert, Menu Item:                             See 2.4.      (line  523)
ringBellAfterMoves, option:                    See 3.5.      (line 1586)
rsh, option:                                   See 3.7.      (line 2002)
ruleMoves, option:                             See 3.6.      (line 1853)
ruser, option:                                 See 3.7.      (line 2007)
sameColorGames, option:                        See 3.1.      (line 1027)
Save Game, Menu Item:                          See 2.1.      (line  154)
saveGameFile, option:                          See 3.4.      (line 1518)
saveOutOfBookInfo, option`:                    See 3.4.      (line 1557)
savePositionFile, option:                      See 3.4.      (line 1543)
scp, option:                                   See 3.1.      (line 1036)
sd, option:                                    See 3.1.      (line  948)
searchDepth, option:                           See 3.1.      (line  948)
searchTime, option:                            See 3.1.      (line  941)
secondChessProgram, option:                    See 3.1.      (line 1036)
secondComputerString, option:                  See 3.1.      (line 1091)
secondDirectory, option:                       See 3.1.      (line 1055)
secondHasOwnBookUCI, option:                   See 3.2.      (line 1185)
secondHost, option:                            See 3.1.      (line 1047)
secondInitString, option:                      See 3.1.      (line 1064)
secondIsUCI, option:                           See 3.2.      (line 1159)
secondNeedsNoncompliantFEN, option:            See 3.1.      (line 1141)
secondNPS, option:                             See 3.1.      (line  957)
secondOptions, option:                         See 3.1.      (line 1130)
secondProtocolVersion, option:                 See 3.1.      (line 1108)
secondScoreAbs, option:                        See 3.1.      (line 1116)
secondTimeOdds, option:                        See 3.1.      (line  975)
secondXBook, option:                           See 3.2.      (line 1185)
set, ICS command:                              See 4.        (line 2109)
Settings, Engine:                              See 3.2.      (line 1157)
sgf, option:                                   See 3.4.      (line 1518)
sh, option:                                    See 3.1.      (line 1047)
Shortcut keys:                                 See 2.7.      (line  845)
Show Coords, Menu Item:                        See 2.5.      (line  785)
Show Engine Output, Menu Item:                 See 2.2.      (line  347)
Show Game List, Menu Item:                     See 2.2.      (line  338)
Show Move History, Menu Item:                  See 2.2.      (line  342)
showButtonBar, option:                         See 3.5.      (line 1667)
showCoords, option:                            See 3.5.      (line 1637)
showThinking, option:                          See 3.1.      (line  992)
size, option:                                  See 3.5.      (line 1607)
sNoOwnBookUCI, option:                         See 3.2.      (line 1185)
soundChallenge, option:                        See 3.3.      (line 1436)
soundChannel, option:                          See 3.3.      (line 1436)
soundIcsAlarm, option:                         See 3.3.      (line 1444)
soundIcsDraw, option:                          See 3.3.      (line 1455)
soundIcsLoss, option:                          See 3.3.      (line 1451)
soundIcsUnfinished, option:                    See 3.3.      (line 1459)
soundIcsWin, option:                           See 3.3.      (line 1447)
soundKibitz, option:                           See 3.3.      (line 1436)
soundMove, option:                             See 3.3.      (line 1441)
soundProgram, option:                          See 3.3.      (line 1420)
soundRequest, option:                          See 3.3.      (line 1436)
Sounds:                                        See 3.3.      (line 1420)
soundSeek, option:                             See 3.3.      (line 1436)
soundShout, option:                            See 3.3.      (line 1436)
soundSShout, option:                           See 3.3.      (line 1436)
soundTell, option:                             See 3.3.      (line 1436)
spf, option:                                   See 3.4.      (line 1543)
st, option:                                    See 3.1.      (line  941)
Step Menu:                                     See 2.4.      (line  458)
Stop Examining, Menu Item:                     See 2.3.      (line  452)
Stop Observing, Menu Item:                     See 2.3.      (line  448)
sUCI, option:                                  See 3.2.      (line 1159)
tc, option:                                    See 3.1.      (line  918)
td, option:                                    See 3.4.      (line 1513)
telnet, option:                                See 3.3.      (line 1247)
telnetProgram, option:                         See 3.3.      (line 1256)
Test Legality, Menu Item:                      See 2.5.      (line  798)
testClaims, option:                            See 3.6.      (line 1829)
testLegality, option:                          See 3.5.      (line 1603)
thinking, option:                              See 3.1.      (line  992)
Time Control, Menu Item:                       See 2.5.      (line  595)
timeControl, option:                           See 3.1.      (line  918)
timeDelay, option:                             See 3.4.      (line 1513)
timeIncrement, option:                         See 3.1.      (line  927)
timeOddsMode, option:                          See 3.1.      (line  981)
title, option:                                 See 3.5.      (line 1659)
titleInWindow, option:                         See 3.5.      (line 1659)
Training, Menu Item:                           See 2.2.      (line  328)
trivialDraws, option:                          See 3.6.      (line 1842)
Truncate Game, Menu Item:                      See 2.4.      (line  527)
Two Machines, Menu Item:                       See 2.2.      (line  235)
usePolyglotBook, option:                       See 3.2.      (line 1171)
User interface options:                        See 3.5.      (line 1574)
userName, option:                              See 3.7.      (line 2011)
useTelnet, option:                             See 3.3.      (line 1247)
variant, option:                               See 3.7.      (line 1883)
vars, ICS command:                             See 4.        (line 2106)
whitePieceColor, option:                       See 3.5.      (line 1773)
who, ICS command:                              See 4.        (line 2062)
xflash, option:                                See 3.5.      (line 1680)
Table of Contents
*****************

Introduction
1 Major modes
2 Menus, buttons, and keys
  2.1 File Menu
  2.2 Mode Menu
  2.3 Action Menu
  2.4 Step Menu
  2.5 Options Menu
  2.6 Help Menu
  2.7 Other Shortcut Keys
3 Options
  3.1 Chess Engine Options
  3.2 UCI + WB Engine Settings
  3.3 ICS options
  3.4 Load and Save options
  3.5 User interface options
  3.6 Adjudication Options
  3.7 Other options
4 Chess Servers
5 Firewalls
6 Environment variables
7 Limitations and known bugs
8 Reporting problems
9 Authors and contributors
10 CMail
  10.1 CMail options
  10.2 Starting a CMail Game
  10.3 Answering a Move
  10.4 Multi-Game Messages
  10.5 Completing a Game
  10.6 Known CMail Problems
11 Other programs you can use with XBoard
  11.1 GNU Chess
  11.2 Fairy-Max
  11.3 HoiChess
  11.4 Crafty
  11.5 zic2xpm
Copyright
GNU GENERAL PUBLIC LICENSE
Index