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'''[[Main Page|Home]] * [[Search]] * [[Score]] * Contempt Factor'''
The '''Contempt Factor''' reflects the estimated superiority/inferiority of the program over its opponent. The Contempt factor is assigned as [[Score#DrawScore|draw score]] to avoid (early) [[Draw|draws]] against apparently weaker opponents, or to prefer draws versus stronger opponents otherwise.
=Too little Respect=
For stronger programs it might be dangerous to avoid draws by [[Fifty-move Rule]], as happened for instance at the [[WCRCC 2007|1st World Computer Rapid Chess Championship]] in [[WCRCC 2007#TerraPiHiarcs|the game]] between [[Hiarcs]] and [[Alaric]] aka TerraPi <ref>[http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=132936&t=15295 Re: 2007 World Computer Rapid Chess Championships: games pgn] by [[Harvey Williamson]], [[CCC]], July 23, 2007</ref> .
=Too much Respect=
An example of too much respect appeared during the [[WMCCC 1990]] in Lyon, [[Mephisto Lyon|Mephisto]] versus [[Échec]] <ref>[https://www.game-ai-forum.org/icga-tournaments/round.php?tournament=60&round=5&id=3 Lyon 1990, Chess, Round 5, Game 3] from [http://www.grappa.univ-lille3.fr/icga/ ICGA Tournaments]</ref> . Échec had something like +4 pawn-units for the final [[Repetitions|repeated]] position, while it had almost a won game otherwise.
=See also=
* [[Chess Game]]
* [[CPW-Engine_search]]
* [[Draw]]
* [[Draw Evaluation]]
* [[Score#DrawScore|Draw Scores]]
* [[Fifty-move Rule]]
* [[Playing Strength]]
* [[Repetitions]]
* [[Stalemate]]
=Forum Posts=
==1998 ...==
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/d8ab99782b3b68ca Computers and Draws by Repetition] by Jeff Anderson, [[Computer Chess Forums|rgcc]], July 5, 1998
* [https://www.stmintz.com/ccc/index.php?id=32830 Strange draw Junior5-Comet32 Amir?] by [[Tony Hedlund]], [[CCC]], November 13, 1998
==2000 ...==
* [https://www.stmintz.com/ccc/index.php?id=215496 Contempt factor] by [[Benny Antonsson]], [[CCC]], February 25, 2002
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=38410 Playing better moves in drawish positions (anti-0.00)] by [[Onno Garms]], [[CCC]], March 13, 2011 » [[Onno]]
* [http://www.talkchess.com/forum/viewtopic.php?t=40206 The importance of contempt] by [[Don Dailey]], [[CCC]], August 28, 2011
* [http://www.talkchess.com/forum/viewtopic.php?t=40386 final drawscore testing results] by [[Robert Hyatt]], [[CCC]], September, 13, 2011
* [http://www.talkchess.com/forum/viewtopic.php?t=49062 Tuning for rating lists ?] by [[Marco Costalba]], [[CCC]], August 23, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=49248 Contempt and the ELO model] by [[Michel Van den Bergh]], [[CCC]], September 05, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=52069 Time based contempt] by [[Michel Van den Bergh]], April 20, 2014 » [[Time Management]]
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=55623 Stockfish contempt factor] by [[Kai Laskos]], [[CCC]], March 10, 2015 » [[Stockfish]]
* [http://www.talkchess.com/forum/viewtopic.php?t=63955 Symmetric multiprocessing (SMP) scaling - K10.4 Contempt=0] by [[Andreas Strangmüller]], [[CCC]], May 11, 2017 » [[SMP]], [[Komodo]]
* [http://www.talkchess.com/forum/viewtopic.php?t=63967 Symmetric multiprocessing (SMP) scaling - SF8 Contempt=10] by [[Andreas Strangmüller]], [[CCC]], May 13, 2017 » [[SMP]], [[Stockfish]]
* [http://www.talkchess.com/forum/viewtopic.php?t=66444 New Stockfish contempt] by [[Jouni Uski]], [[CCC]], January 29, 2018 » [[Stockfish]]
* [https://groups.google.com/d/msg/fishcooking/nqgLNUfjkok/gfMr7amXCAAJ Wrong use of SPRT] by [[Uri Blass]], [[Computer Chess Forums|FishCooking]], February 09, 2018 » [[Match Statistics#SPRT|SPRT]]
* [http://www.talkchess.com/forum/viewtopic.php?t=66793 Elo measurement of contempt in SF in self-play] by [[Michel Van den Bergh]], [[CCC]], March 10, 2018 » [[Playing Strength]], [[Stockfish]]
=External Links=
* [http://web.archive.org/web/20070707023203/www.brucemo.com/compchess/programming/contempt.htm Contempt Factor] from [[Bruce Moreland|Bruce Moreland's]] [http://web.archive.org/web/20070607231311/www.brucemo.com/compchess/programming/index.htm Programming Topics]
* [http://mediocrechess.blogspot.com/2007/01/guide-contempt-factor.html Contempt factor] from [http://mediocrechess.varten.org/index.html Mediocre Chess] by [[Jonatan Pettersson]]
=References=
<references />
'''[[Score|Up one Level]]'''
The '''Contempt Factor''' reflects the estimated superiority/inferiority of the program over its opponent. The Contempt factor is assigned as [[Score#DrawScore|draw score]] to avoid (early) [[Draw|draws]] against apparently weaker opponents, or to prefer draws versus stronger opponents otherwise.
=Too little Respect=
For stronger programs it might be dangerous to avoid draws by [[Fifty-move Rule]], as happened for instance at the [[WCRCC 2007|1st World Computer Rapid Chess Championship]] in [[WCRCC 2007#TerraPiHiarcs|the game]] between [[Hiarcs]] and [[Alaric]] aka TerraPi <ref>[http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=132936&t=15295 Re: 2007 World Computer Rapid Chess Championships: games pgn] by [[Harvey Williamson]], [[CCC]], July 23, 2007</ref> .
=Too much Respect=
An example of too much respect appeared during the [[WMCCC 1990]] in Lyon, [[Mephisto Lyon|Mephisto]] versus [[Échec]] <ref>[https://www.game-ai-forum.org/icga-tournaments/round.php?tournament=60&round=5&id=3 Lyon 1990, Chess, Round 5, Game 3] from [http://www.grappa.univ-lille3.fr/icga/ ICGA Tournaments]</ref> . Échec had something like +4 pawn-units for the final [[Repetitions|repeated]] position, while it had almost a won game otherwise.
=See also=
* [[Chess Game]]
* [[CPW-Engine_search]]
* [[Draw]]
* [[Draw Evaluation]]
* [[Score#DrawScore|Draw Scores]]
* [[Fifty-move Rule]]
* [[Playing Strength]]
* [[Repetitions]]
* [[Stalemate]]
=Forum Posts=
==1998 ...==
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/d8ab99782b3b68ca Computers and Draws by Repetition] by Jeff Anderson, [[Computer Chess Forums|rgcc]], July 5, 1998
* [https://www.stmintz.com/ccc/index.php?id=32830 Strange draw Junior5-Comet32 Amir?] by [[Tony Hedlund]], [[CCC]], November 13, 1998
==2000 ...==
* [https://www.stmintz.com/ccc/index.php?id=215496 Contempt factor] by [[Benny Antonsson]], [[CCC]], February 25, 2002
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=38410 Playing better moves in drawish positions (anti-0.00)] by [[Onno Garms]], [[CCC]], March 13, 2011 » [[Onno]]
* [http://www.talkchess.com/forum/viewtopic.php?t=40206 The importance of contempt] by [[Don Dailey]], [[CCC]], August 28, 2011
* [http://www.talkchess.com/forum/viewtopic.php?t=40386 final drawscore testing results] by [[Robert Hyatt]], [[CCC]], September, 13, 2011
* [http://www.talkchess.com/forum/viewtopic.php?t=49062 Tuning for rating lists ?] by [[Marco Costalba]], [[CCC]], August 23, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=49248 Contempt and the ELO model] by [[Michel Van den Bergh]], [[CCC]], September 05, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=52069 Time based contempt] by [[Michel Van den Bergh]], April 20, 2014 » [[Time Management]]
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=55623 Stockfish contempt factor] by [[Kai Laskos]], [[CCC]], March 10, 2015 » [[Stockfish]]
* [http://www.talkchess.com/forum/viewtopic.php?t=63955 Symmetric multiprocessing (SMP) scaling - K10.4 Contempt=0] by [[Andreas Strangmüller]], [[CCC]], May 11, 2017 » [[SMP]], [[Komodo]]
* [http://www.talkchess.com/forum/viewtopic.php?t=63967 Symmetric multiprocessing (SMP) scaling - SF8 Contempt=10] by [[Andreas Strangmüller]], [[CCC]], May 13, 2017 » [[SMP]], [[Stockfish]]
* [http://www.talkchess.com/forum/viewtopic.php?t=66444 New Stockfish contempt] by [[Jouni Uski]], [[CCC]], January 29, 2018 » [[Stockfish]]
* [https://groups.google.com/d/msg/fishcooking/nqgLNUfjkok/gfMr7amXCAAJ Wrong use of SPRT] by [[Uri Blass]], [[Computer Chess Forums|FishCooking]], February 09, 2018 » [[Match Statistics#SPRT|SPRT]]
* [http://www.talkchess.com/forum/viewtopic.php?t=66793 Elo measurement of contempt in SF in self-play] by [[Michel Van den Bergh]], [[CCC]], March 10, 2018 » [[Playing Strength]], [[Stockfish]]
=External Links=
* [http://web.archive.org/web/20070707023203/www.brucemo.com/compchess/programming/contempt.htm Contempt Factor] from [[Bruce Moreland|Bruce Moreland's]] [http://web.archive.org/web/20070607231311/www.brucemo.com/compchess/programming/index.htm Programming Topics]
* [http://mediocrechess.blogspot.com/2007/01/guide-contempt-factor.html Contempt factor] from [http://mediocrechess.varten.org/index.html Mediocre Chess] by [[Jonatan Pettersson]]
=References=
<references />
'''[[Score|Up one Level]]'''
