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On the tenth anniversary of the start of Fruit development in 2014, Fabien
Letouzey released a completely new engine, Senpai, under the GPLv3. Senpai makes use of chess engine developments made in the intervening decade. It differs from Fruit in using bitboards and C++11's thread support for
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Toga II is a derivative created by Thomas Gaksch, currently continued by Jerry Donald Watson. It has more chess knowledge, multi-processor support, and perhaps a better search algorithm. It is based on Fruit 2.1 and is free. The strongest version is
723:
GambitFruit is another free derivative of Fruit 2.1, created by Ryan
Benitez. It plays a more aggressive style and has more chess knowledge. GambitFruit also incorporates improvements from Toga II. Development of GambitFruit stopped in 2005.
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have competed in the World
Computer Chess Championship (WCCC). At about 80 ELO above Fruit 2.3.1, Toga II is the strongest Fruit derivative as of March 2014.
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In June 2011, a lengthy investigation by the
International Computer Games Association (ICGA) determined Rybka was plagiarized from Fruit and
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Fruit
Reloaded by Fabien Letouzey, Daniel Mehrmann and Ryan Benitez is an independent fork of Fruit 2.1 with a number of enhancements.
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and as such contributed much to the development in computer chess in recent years. Some people still work on the v2.1
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of 2842. In the CEGT rating list released on
January 24, 2007, Fruit version 2.2.1 had a rating of 2776.
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public interview conducted by Nelson
Hernandez on July 4, 2011. Rajlich had previously said:
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I went through the Fruit 2.1 source code forwards and backwards and took many things.
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6.x is based on Fruit 2.1 and the project is since 2011 under active development.
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with a robust search. Later versions have improved evaluation functions. The
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In 2008, forks of Toga II started to appear, like
Grapefruit and Cyclone.
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in 2005, Fruit 2.2 scored 8.5 out of 11, finishing in second place behind
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1012:"Rybka disqualified and banned from World Computer Chess Championships"
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rating list released on
November 24, 2006, Fruit version 2.2.1 had a
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898:"Fruit 1.0 UCI (with source code) now available"
1101:Official distribution web site (2.1 and below)
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661:to traverse the game tree. It also uses the
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1057:"Interview with Vasik Rajlich (Dec 2005)"
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849:Learn how and when to remove this message
685:of Fruit with version 2.3.1, the earlier
665:. The original version used a simplistic
812:This article includes a list of general
673:is distinct — Fruit uses a 16x16 board.
213:. Fruit 2.3.1 was one of the top 3 free
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227:
1039:"Another interview with Vasik Rajlich"
953:Fruit Chess Engine by Fabien Letouzey
294:Efficiently updatable neural networks
223:This article is part of the series on
7:
1113:Toga II Developers Discussion Board
896:Letouzey, Fabien (March 17, 2004).
194:subject to the requirements of the
818:it lacks sufficient corresponding
209:As of July 23, 2007, Fruit became
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681:Although in 2007 Fabien Letouzey
173:World Computer Chess Championship
1045:from the original on 2021-12-21.
922:Benitez, Ryan (August 2, 2007).
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299:Handcrafted evaluation functions
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645:Technical details of Fruit 2.1
76:2.3.1 / August 2, 2007
1:
1014:. Chess Vibes. Archived from
192:free and open-source software
902:Computer Chess Club Archives
314:Stochastic gradient descent
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364:Principal variation search
196:GNU General Public License
120:GNU General Public License
965:"Custom engine selection"
693:for many other programs.
649:Fruit uses the classical
206:from the original Fruit.
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65:
1091:Official Fruit Homepage
833:more precise citations.
683:stopped the development
657:search) algorithm with
374:Monte Carlo tree search
924:"Fruit 2.3.1 released"
484:Dragon by Komodo Chess
309:Reinforcement learning
78:; 17 years ago
53:; 20 years ago
329:Unsupervised learning
247:Board representations
27:Chess engine software
671:board representation
279:Deep neural networks
272:Evaluation functions
18:Fruit (chess engine)
1037:Hernandez, Nelson.
667:evaluation function
663:null-move heuristic
659:iterative deepening
655:principal variation
319:Supervised learning
304:Piece-square tables
186:Until Version 2.1 (
51:March 17, 2004
32:
691:provided the basis
359:Alpha-beta pruning
204:created variations
37:Original author(s)
1107:Fruit derivatives
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747:Rybka controversy
710:computer clusters
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369:Quiescence search
348:search algorithms
229:Chess programming
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16:(Redirected from
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1096:Fruit 2.1 source
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1077:. 17 March 2014.
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1059:. Archived from
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1018:on 30 March 2014
1010:Doggers, Peter.
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990:"Fruit Reloaded"
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873:"Team / History"
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820:inline citations
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755:. The author of
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825:Please help to
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153:Fabien Letouzey
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42:Fabien Letouzey
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1085:External links
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1063:on 2011-03-05.
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71:Final release
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1128:CCRL website
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1061:the original
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1020:. Retrieved
1016:the original
1005:
994:. Retrieved
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972:. Retrieved
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689:2.1 version
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419:Deep Thought
399:ChessMachine
324:Texel tuning
283:Transformers
208:
187:
185:
170:
149:chess engine
144:
143:
122:(until v2.1)
117:(after v2.1)
113:proprietary
102:Chess engine
831:introducing
719:GambitFruit
705:Toga II 4.0
687:open source
677:Derivatives
474:CuckooChess
464:Chess Tiger
200:source code
134:.fruitchess
1137:Categories
1118:Grapefruit
996:2014-03-17
882:2014-03-17
839:April 2009
814:references
795:References
544:MChess Pro
479:Deep Fritz
409:Cray Blitz
83:2007-08-02
58:2004-03-17
974:March 18,
933:March 19,
907:March 18,
733:GNU Chess
728:GNU Chess
651:Negascout
599:Turochamp
589:Stockfish
584:SmarThink
529:KnightCap
504:GNU Chess
489:Fairy-Max
459:AlphaZero
414:Deep Blue
289:Attention
259:Bitboards
202:and have
177:Reykjavík
155:. In the
1075:"Senpai"
1043:Archived
783:See also
574:Shredder
434:Mephisto
404:ChipTest
211:freeware
115:freeware
1022:29 June
827:improve
697:Toga II
549:Mittens
514:Houdini
354:Minimax
171:At the
167:History
127:Website
109:License
81: (
56: (
816:, but
770:Senpai
753:Crafty
554:MuZero
534:Komodo
524:Junior
519:Ikarus
509:HIARCS
469:Crafty
439:Saitek
424:HiTech
161:rating
757:Rybka
604:Zappa
594:Torch
579:Sjeng
569:Rybka
564:REBEL
499:Fruit
494:Fritz
429:Hydra
394:Belle
342:Graph
188:Peach
181:Zappa
147:is a
145:Fruit
31:Fruit
1024:2011
976:2014
969:CCRL
935:2014
909:2014
559:Naum
346:tree
344:and
254:0x88
157:SSDF
136:.com
97:Type
777:SMP
215:UCI
175:in
132:www
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
