Échec

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**Échec**,
a chess program by [[Marc-François Baudot]] in association with [[Jean-Christophe Weill]]. 

=Tournaments=
Échec played following [[World Computer Chess Championship|World-]] and [[World Microcomputer Chess Championship|World Microcomputer Chess Championships]]. In [[WMCCC 1990|Lyon 1990]], Échec became strong runner up, and had even chances to tie or win the title, after gaining an almost winning position versus later winner [[Mephisto]], but only managed a [[WMCCC 1990#DrawbyReputation|draw by reputation]] with a draw score of four Pawns from [[Contempt Factor|contempt factor]]:
||~ Event ||~ year ||~ Site ||~ standing ||~ points ||
|| [[WMCCC 1990|10th WMCCC]] ||> 1990 || Lyon ||> 2 / 12 ||> 5½ / 7 ||
|| [[WMCCC 1991|11th WMCCC]] ||> 1990 || Vancouver ||> 10 / 15 ||> 3½ / 7 ||
|| [[WCCC 1992|7th WCCC]] ||> 1992 || Madrid ||> 19 / 22 ||> 1½ / 5 ||

=Description=
from [[Don Beal|Don Beal's]] [[WMCCC 1991]] report <ref>[[Don Beal]] (**1991**). //Report on the [[WMCCC 1991|11th World Microcomputer Chess Championship]]//. [[ICGA Journal|ICCA Journal]], Vol. 14, No. 2</ref>:
|| {{Written by Marc-François Baudot, in association with Jean-Christophe Weill of [[Cumulus]] (they collaborate on ideas and code, but have different programs reflecting their different opinions and experiments. Échec's [[Evaluation function|evaluation function]] includes [[Piece-Square Tables|piece placement]] relative to [[Pawn Structure|pawn structure]], pawn structure itself, taking into account of which major or minor pieces are on the board, [[Mobility|mobility]], etc. (Marc reports that this was badly tuned, with the result that Échec's positional play was poor in the tournament). [[Search]] techniques include [[Check Extensions|check extensions]] but not [[Singular Extensions|singular extensions]], plus extensions for some mate threats and [[Promotions|promotion]].}} ||

=External Links= 
* [[http://www.game-ai-forum.org/icga-tournaments/program.php?id=229|Échec's ICGA Tournaments]]

=References= 
<references />
=What links here?=
[[include page="Échec" component="backlinks" limit="40" ]]
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