added option for work-around for some FRC engines in regards to FRCFENs

[xboard.git] / xboard.texi

diff --git a/xboard.texi b/xboard.texi
index 55a73e1..e26ff5c 100644 (file)
--- a/xboard.texi
+++ b/xboard.texi
@@ -1297,7 +1297,7 @@ with smooth operation of WinBoard (or the rest of your system).
 Negative values could increase the engine priority, which is not recommended.\r
 @item -firstOptions string\r
 @itemx -secondOptions string\r
-@cindex firstOptions option\r
+@cindex firstOptions, option\r
 @cindex secondOptions, option\r
 The given string is a comma-separated list of (option name, option value) pairs, \r
 like the following example: “style=Karpov,blunder rate=0”. \r
@@ -1306,6 +1306,20 @@ matches one of the option names (i.e. 
 it would be set to the given value (i.e. “Karpov” or 0) \r
 through a corresponding option command to the engine. \r
 This provided that the type of the value (text or numeric) matches as well.\r
+@item -firstNeedsNoncompliantFEN string\r
+@itemx -secondNeedsNoncompliantFEN string\r
+@cindex firstNeedsNoncompliantFEN, option\r
+@cindex secondNeedsNoncompliantFEN, option\r
+The castling rights and e.p. fields of the FEN sent to the mentioned engine \r
+with the setboard command will be replaced by the given string. This can for \r
+instance be used to run engines that do not understand Chess960 FENs in \r
+variant fischerandom, to make them at least understand the opening position, \r
+through setting the string to “KQkq -”. (Note you also have to give the e.p. field!) \r
+Other possible applications are to provide work-arounds for engines that want to see \r
+castling and e.p. fields in variants that do not have castling or e.p. \r
+(shatranj, courier, xiangqi, shogi) so that WinBoard would normally omit them \r
+(string = “- -“), or to add variant-specific fields that are not yet supported by WinBoard \r
+(e.g. to indicate the number of checks in 3check).\r
 @end table\r
 \r
 @node UCI + WB Engine Settings\r