Difference between revisions of "Asymmetric Evaluation"
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* [[Ingo Althöfer]] ('''1992'''). ''On Asymmetries in Chess Programs.'' [[ICGA Journal#15_1|ICCA Journal, Vol. 15, No. 1]] | * [[Ingo Althöfer]] ('''1992'''). ''On Asymmetries in Chess Programs.'' [[ICGA Journal#15_1|ICCA Journal, Vol. 15, No. 1]] | ||
* [[Javier Ros Padilla]] ('''1994'''). ''Estimating Asymmetry and Selectivity in Chess Programs''. [[ICGA Journal#17_1|ICCA Journal, Vol. 17, No. 1]] <ref>[https://groups.google.com/d/msg/rec.games.chess/5_dMbe0_juo/bXQQVYVEpykJ ICCA Journal, Vol. 17, No. 1] by [[Jos Uiterwijk]], [[Computer Chess Forums|rgcc]], May 02, 1994</ref> | * [[Javier Ros Padilla]] ('''1994'''). ''Estimating Asymmetry and Selectivity in Chess Programs''. [[ICGA Journal#17_1|ICCA Journal, Vol. 17, No. 1]] <ref>[https://groups.google.com/d/msg/rec.games.chess/5_dMbe0_juo/bXQQVYVEpykJ ICCA Journal, Vol. 17, No. 1] by [[Jos Uiterwijk]], [[Computer Chess Forums|rgcc]], May 02, 1994</ref> | ||
| + | * [[Mathematician#DCarmel|David Carmel]], [[Shaul Markovitch]] ('''1994'''). ''[https://www.semanticscholar.org/paper/The-M*-Algorithm%3A-Incorporating-Opponent-Models-Carmel-Markovitch/bd788272c81951dc44fa7944e0f72451ced14129 The M* Algorithm: Incorporating Opponent Models into Adversary Search]''. CIS Report #9402, [http://www.cs.technion.ac.il/~shaulm/papers/pdf/Carmel-Markovitch-CIS9402.pdf pdf] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=54865&start=27 Re: Different eval for white/black] by [[Ronald de Man]], [[CCC]], January 08, 2015</ref> | ||
=Forum Posts= | =Forum Posts= | ||
Latest revision as of 22:11, 2 July 2020
Home * Evaluation * Asymmetric Evaluation
Some programs score certain terms differently for the side they are playing and for the opponent. Most often the big terms, like king safety, passed pawn evaluation or mobility are scaled in some way. Whilst it might be argued that this idea runs counter the definition of chess as a zero-sum game, it also allows greater freedom in shaping the program's playing style. Richard Lang's programs were famous for their asymmetry in evaluation and forward pruning [2] , which emphasis safety (rules like 'do not start a wild attack, but worry a lot if the opponent does so') [3] .
Contents
See also
Publications
- Ingo Althöfer (1992). On Asymmetries in Chess Programs. ICCA Journal, Vol. 15, No. 1
- Javier Ros Padilla (1994). Estimating Asymmetry and Selectivity in Chess Programs. ICCA Journal, Vol. 17, No. 1 [4]
- David Carmel, Shaul Markovitch (1994). The M* Algorithm: Incorporating Opponent Models into Adversary Search. CIS Report #9402, pdf [5]
Forum Posts
1997 ...
- asymmetry by Andrew Tridgell, rgcc, August 12, 1997 » KnightCap, Parity Pruning
- Re: Junior's long lines: more data about this... by Don Dailey, CCC, December 26, 1997
- Genius' asymmetric-search by example: TRY yourself by Thorsten Czub, rgcc, December 30, 1997
- Asymetric king safety by Tom King, rgcc, March 13, 1999
2000 ...
- Parity of depth level and evaluation by Claude Le Page, CCC, June 13, 2005
2010 ...
- evaluating color agnostic terms by Alvaro Cardoso, CCC, October 15, 2013
- Different eval for white/black by Matthew Lai, CCC, January 05, 2015
- Asymmetric evaluation function by Fabio Gobbato, CCC, July 24, 2015
- Asymmetrical evaluation by Laurie Tunnicliffe, CCC, May 24, 2016 » Odd-Even Effect
- Symmetrical evaluation and endgame by Hamfer, OpenChess Forum, June 02, 2016 » Tempo
- Why Lc0 eval (in cp) is asymmetric against AB engines? by Kai Laskos, CCC, July 25, 2018 » Leela Chess Zero, Pawn Advantage, Win Percentage, and Elo
2020 ...
- asymmetric evaluation and TT by Vivien Clauzon, CCC, June 02, 2020 » Transposition Table
References
- ↑ Henry Moore - Helmed Head N° 2 (1950), Bronze on Marble slab, Art Museum, Bochum, North Rhine-Westphalia, Germany,, Photo by Gerd Isenberg, October 30, 2016, see also 2011 image of the sculpture at Art Gallery of New South Wales from Wikimedia Commons
- ↑ Genius' asymmetric-search by example: TRY yourself by Thorsten Czub, rgcc, December 30, 1997
- ↑ Kaare Danielsen (1987). The 7th World Microcomputer Chess Championship, Rome, Italy, September 14-20, 1987. ICCA Journal, Vol. 10, No. 3 » WMCCC 1987
- ↑ ICCA Journal, Vol. 17, No. 1 by Jos Uiterwijk, rgcc, May 02, 1994
- ↑ Re: Different eval for white/black by Ronald de Man, CCC, January 08, 2015
