<title>Chess engine options - XBoard</title>
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-<p>
<a name="Chess-engine-options"></a>
+<p>
Next: <a rel="next" accesskey="n" href="UCI-_002b-WB-Engine-Settings.html#UCI-_002b-WB-Engine-Settings">UCI + WB Engine Settings</a>,
Up: <a rel="up" accesskey="u" href="Options.html#Options">Options</a>
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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.
<br><dt>-hideThinkingFromHuman true/false<dd>Controls the Hide Thinking option. See <a href="Options-Menu.html#Options-Menu">Options Menu</a>. Default: true.
-(Relaces the Show-Thinking option of older xboard versions.)
+(Replaces the Show-Thinking option of older xboard versions.)
<br><dt>-thinking/-xthinking or -showThinking true/false<dd><a name="index-thinking_002c-option-132"></a><a name="index-showThinking_002c-option-133"></a>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 if xboard needs the thinking output for some purpose,
it makes the engine send it despite the setting of this option.)
<br><dt>-ponder/-xponder or -ponderNextMove true/false<dd><a name="index-ponder_002c-option-134"></a><a name="index-ponderNextMove_002c-option-135"></a>Sets the Ponder Next Move menu option. See <a href="Options-Menu.html#Options-Menu">Options Menu</a>. Default: true.
-<br><dt>-smpCores number<dd>Specifies the maxmum nmber of CPUs an SMP engine is allowed to use.
-Only works for engines that support the WinBoard-protocol cores feature.
+<br><dt>-smpCores number<dd>Specifies the maximum number of CPUs an SMP engine is allowed to use.
+Only works for engines that support the XBoard/WinBoard-protocol cores feature.
<br><dt>-mg or -matchGames n<dd><a name="index-mg_002c-option-136"></a><a name="index-matchGames_002c-option-137"></a>Automatically runs an n-game match between two chess engines,
with alternating colors.
If the <code>loadGameFile</code> or <code>loadPositionFile</code> option is set,
Important when XBoard uses the score for adjudications, or in PGN reporting.
<br><dt>-niceEngines priority<dd><a name="index-niceEngines_002c-option-167"></a>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).
+with smooth operation of XBoard (or the rest of your system).
Negative values could increase the engine priority, which is not recommended.
-<br><dt>-firstOptions string<dt>-secondOptions string<dd><a name="index-firstOptions-option-168"></a><a name="index-secondOptions_002c-option-169"></a>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)
+<br><dt>-firstOptions string<dt>-secondOptions string<dd><a name="index-firstOptions_002c-option-168"></a><a name="index-secondOptions_002c-option-169"></a>The given string is a comma-separated list of (option name=option value) pairs,
+like the following example: "style=Karpov,blunder rate=0".
+If an option announced by the engine at startup through the feature commands of the XBoard/WinBoard protocol
+matches one of the option names (i.e. "style" or "blunder rate"),
+it would be set to the given value (i.e. "Karpov" or 0)
through a corresponding option command to the engine.
This provided that the type of the value (text or numeric) matches as well.
+<br><dt>-firstNeedsNoncompliantFEN string<dt>-secondNeedsNoncompliantFEN string<dd><a name="index-firstNeedsNoncompliantFEN_002c-option-170"></a><a name="index-secondNeedsNoncompliantFEN_002c-option-171"></a>The castling rights and e.p. fields of the FEN sent to the mentioned engine
+with the setboard command will be replaced by the given string. This can for
+instance be used to run engines that do not understand Chess960 FENs in
+variant fischerandom, to make them at least understand the opening position,
+through setting the string to "KQkq -". (Note you also have to give the e.p. field!)
+Other possible applications are to provide work-arounds for engines that want to see
+castling and e.p. fields in variants that do not have castling or e.p.
+(shatranj, courier, xiangqi, shogi) so that XBoard would normally omit them
+(string = "- -"), or to add variant-specific fields that are not yet supported by XBoard
+(e.g. to indicate the number of checks in 3check).
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projects / xboard.git / blobdiff