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Fabien Letouzey

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Created page with "'''Home * People * Fabien Letouzey''' border|right|thumb| Fabien Letouzey <ref>Photos [[WCCC 2005 by Gerd Isenberg</ref>..."
'''[[Main Page|Home]] * [[People]] * Fabien Letouzey'''

[[FILE:FabienLetouzey2005.JPG|border|right|thumb| Fabien Letouzey <ref>Photos [[WCCC 2005]] by [[Gerd Isenberg]]</ref> ]]

'''Fabien Letouzey''',<br/>
a French computer chess and games programmer and developer of the chess programs [[Fruit]] <ref>[http://arctrix.com/nas/chess/fruit/ Fruit Chess Engine by Fabien Letouzey]</ref>, [[Chess-64]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=16738&start=13 Re: Congratulations to Anthony !] by [[Ryan Benitez]], [[CCC]], September 27, 2007</ref> and [[Senpai]], the [[Othello]] programs ''Turtle'', ''Snail'' <ref>[http://pagesperso-orange.fr/brunodlb/othelinu.htm Programmes d'Othello® et de Reversi pour Linux]</ref>, ''Piloth'' <ref>[http://www.othello.dk/book/index.php/Fabien_Letouzey Fabien Letouzey, othello programmer of Snail, Turtle and Piloth.]</ref>, ''Decapus'' (10x10) and ''Octopus'' (8x8), the latter Gold medal winners at the [[20th Computer Olympiad#Othello|20th Computer Olympiad, Leiden 2017]], the [[UCI]]-[[Chess Engine Communication Protocol|Winboard]] adapter [[PolyGlot]], and the [[Draughts|International Draughts]] programs ''Toy'' <ref>[http://windames.free.fr/toy_e.html Toy] by [[Fabien Letouzey]] from [http://windames.free.fr/apage76_e.html All 10x10 programs in the world]</ref>, and [[Scan]], which surprised the Draughts scene in winning the [[18th Computer Olympiad#Draughts|18th Computer Olympiad, Leiden 2015]], and defended its title in [[19th Computer Olympiad#Draughts|2016]] and [[20th Computer Olympiad#Draughts|2017]] respectively. Fabien further works with [[Rémi Coulom]] to improve his [[Go]] playing program [[Crazy Stone]] due to [[Deep Learning|deep learning]] <ref>[[Go#FineArtVideo|Behind the scenes of Fine Art]] with report on [https://en.wikipedia.org/wiki/Computer_Go_UEC_Cup Computer Go UEC Cup], March 2017 @ 9:00</ref>.

=Fruit=
The release of [[Fruit]] until version 2.1 under [[Free Software Foundation#GPL|GNU General Public License]] was a "revolution" in computer chess in 2005 - an [[Open Source Engines|open source program]] was "suddenly" competitive with the long time leading programs [[Shredder]] and [[Junior]], as demonstrated at the [[WCCC 2005]], where Fruit became runner up behind [[Zappa]]. After the great success of Reykjavik, and Fabien Letouzey met his professional colleagues, he decided to close the source and to go commercial - short after Fruit derivate appeared, based on the source code of Fruit 2.1, most notably [[Toga]] <ref>[http://www.superchessengine.com/toga_ii.htm Toga II] by [[Thomas Gaksch]] and Fabien Letouzey</ref> by [[Thomas Gaksch]]. Fabien finished his commercial computer chess career so far in 2007 <ref>[http://www.fruitchess.com/ Fruit - pure playing strength]</ref>. Fruit 2.3+ is non [[Free Software Foundation#GPL|GPL]] with full rights given to [[Ryan Benitez]], while Fruit 2.1 is now owned by the [[Free Software Foundation]] <ref>[http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=260688&t=27385 Re: When will come a new Toga Engine?] by [[Ryan Benitez]] from [[CCC]], April 10, 2009</ref>.

=Anniversary=
In March 2014, ten years after the initial Fruit 1.0 release, Fabien announced and published his new [[Open Source Engines|open source engine]] [[Senpai]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=51637 Senpai 1.0 (new engine)] by [[Fabien Letouzey]], [[CCC]], March 17, 2014</ref>, and an independent fork of Fruit 2.1, [[Fruit Reloaded]] by Fabien Letouzey, [[Daniel Mehrmann]] and [[Ryan Benitez]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=51638 Fruit 1.0 anniversary] by [[Fabien Letouzey]], [[CCC]], March 17, 2014</ref>, both hosted by [[Steve Maughan|Steve Maughan's]] Computer Chess Programming <ref>[http://www.chessprogramming.net/senpai/ Senpai Chess Engine - Computer Chess Programming] hosted by [[Steve Maughan]]</ref> <ref>[http://www.chessprogramming.net/fruit-reloaded/ Fruit Reloaded - Computer Chess Programming] hosted by [[Steve Maughan]]</ref>.

=Photos=
==Fruit==
[[FILE:WinnersWCCC2005.jpg|none|border|text-bottom|640px]]
[[WCCC 2005|Winners 2005]], [[Stefan Meyer-Kahlen]], [[Fabien Letouzey]], [[Anthony Cozzie]] and [[Gian-Carlo Pascutto]]

==Scan==
<ref>[http://www.talkchess.com/forum/viewtopic.php?t=56170 Draughts at the ICGA Olympiad] by [[Harm Geert Muller]], [[CCC]], April 30, 2015</ref> <ref>[http://laatste.info/bb3/viewtopic.php?f=53&t=6700 Computer Olympiad 2015 Leiden] by [[Bert Tuyt]], [http://laatste.info/bb3/index.php?sid=a58b41156d433755b2d4b3dc45087638 World Draughts Forum], May 01, 2015</ref>
[[FILE:FabienLetouzeyScan10x10Draughts2015.JPG|none|border|text-bottom|640px]]
10 years later, Fabien's program [[Scan]] won [[Draughts|10x10 Draughts]] at the [[18th Computer Olympiad#Draughts|18th Computer Olympiad]] <ref>Image from the [[18th Computer Olympiad#Draughts|18th Computer Olympiad]], 2015 by [[Gerd Isenberg]]</ref> <ref>[http://hjetten.home.xs4all.nl/dameng.html#perform Harm Jetten's draughts program - Performance]</ref> <br/>
and defended its title at the [[19th Computer Olympiad#Draughts|19th]] and [[20th Computer Olympiad#Draughts|20th Computer Olympiad]] so far

=Selected Publications=
<ref>[http://www.lif.univ-mrs.fr/~fdenis/ François DENIS Pulications]</ref>
* [http://www2.lifl.fr/~decomite/ Francesco de Comité], [http://www.lif.univ-mrs.fr/~fdenis/ François Denis], [http://www.grappa.univ-lille3.fr/~gilleron/ Rémi Gilleron], [[Fabien Letouzey]] ('''1999'''). ''Positive and Unlabeled Examples help Learning'', The 10th International Conference on Algorithmic Learning Theory, available as [http://www.cmi.univ-mrs.fr/%7Efdenis/alt99.ps ps]
* [[Fabien Letouzey]], [http://www.lif.univ-mrs.fr/~fdenis/ François Denis], [http://www.grappa.univ-lille3.fr/~gilleron/ Rémi Gilleron] ('''2000'''). ''Learning from Positive and Unlabeled Examples''. ALT 2000: 71-85, available as [http://www.cmi.univ-mrs.fr/%7Efdenis/alt00a.ps ps]
* [http://www.lif.univ-mrs.fr/~fdenis/ François Denis], [http://www.grappa.univ-lille3.fr/~gilleron/ Rémi Gilleron], [[Fabien Letouzey]] ('''2005'''). ''Learning from positive and unlabeled examples''. Theor. Comput. Sci. 348(1): 70-83

=Forum Posts=
==2000 ...==
* [https://www.stmintz.com/ccc/index.php?id=251543 calculating the PV using MTD] by [[Fabien Letouzey]], [[CCC]], September 11, 2002 » [[MTD(f)]], [[Principal variation]]
* [https://www.stmintz.com/ccc/index.php?id=354016 Re: Fruit - Question for Fabien] by [[Fabien Letouzey]], [[CCC]], March 11, 2004 » [[Node Types]], [[Transposition Table]], [[Principal Variation Search]]
* [https://www.stmintz.com/ccc/index.php?id=354644 Fruit, trying to answer various missed posts] by [[Fabien Letouzey]], [[CCC]], March 15, 2004
* [https://www.stmintz.com/ccc/index.php?id=355103 Fruit 1.0 UCI (with source code) now available] by [[Fabien Letouzey]], [[CCC]], March 17, 2004
==2005 ...==
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=4&t=1622 Safe I/O (repeated)] by [[Fabien Letouzey]], [[Computer Chess Forums|Winboard Forum]], February 11, 2005
* [https://www.stmintz.com/ccc/index.php?id=462330 To Fruit's author Fabien Letouzey and commercial manager Joachim Rang] by [[Marc Lacrosse]], [[CCC]], November 17, 2005
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=37762 Fabien's open letter to the community] by [[Tord Romstad]], [[CCC]], January 23, 2011 <ref>[http://www.thechessmind.net/blog/2011/1/24/more-computer-chess-controversy.html The Chess Mind Blog - More Computer Chess Controversy]</ref> » [[Fabien Rybka Letter]]
* [http://www.open-chess.org/viewtopic.php?f=3&t=1014 Fabien's open letter to the community] by [[Tord Romstad]], [[Computer Chess Forums|OpenChess Forum]], January 23, 2011
* [http://www.talkchess.com/forum/viewtopic.php?t=37777 Interview with Fabien (from the year 2005) ...] by [[Frank Quisinsky]], [[CCC]], January 25, 2011
* [http://www.talkchess.com/forum/viewtopic.php?t=37820 What is a derivative?] by [[Fabien Letouzey]], [[CCC]], January 27, 2011 » [[Clones]]
* [http://www.talkchess.com/forum/viewtopic.php?t=37823 GPL / GNU Licence enforcement] by [[Fabien Letouzey]], [[CCC]], January 27, 2011 » [[Free Software Foundation]]
* [http://talkchess.com/forum/viewtopic.php?start=0&t=37825 Programming language features for computer chess] by [[Fabien Letouzey]], [[CCC]], January 27, 2011
* [http://www.talkchess.com/forum/viewtopic.php?t=51637 Senpai 1.0 (new engine)] by [[Fabien Letouzey]], [[CCC]], March 17, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=51638 Fruit 1.0 anniversary] by [[Fabien Letouzey]], [[CCC]], March 17, 2014
==2015 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=56170&start=2 Re: Draughts at the ICGA Olympiad] by [[Fabien Letouzey]], [[CCC]], April 30, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=56884&start=4 A little more info about Scan by Fabien Letouzey] by [[Jesús Muñoz]], [[CCC]], July 06, 2015
* [http://laatste.info/bb3/viewtopic.php?f=53&t=6786 Scan] by [[Fabien Letouzey]], [http://laatste.info/bb3/index.php?sid=a58b41156d433755b2d4b3dc45087638 World Draughts Forum], July 08, 2015

=External Links=
* [https://www.game-ai-forum.org/icga-tournaments/person.php?id=52 Fabien Letouzey's ICGA Tournaments]
* [http://www.playwitharena.com/?Newsticker:Archive_7 The alternative to Crafty, Interview with Fabien Letouzey] by [[Frank Quisinsky]], [[Arena|Arena Chess GUI 3.0]] - Archive , Page 7, 96, April 05, 2005, [http://www.top-5000.nl/int/fruit.htm also hosted] by [[Ed Schroder|Ed Schröder]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=37777 Interview with Fabien (from the year 2005) ...] by [[Frank Quisinsky]], [[CCC]], January 25, 2011</ref>
* [http://www.chessprogramming.net/senpai/ Senpai Chess Engine - Computer Chess Programming] hosted by [[Steve Maughan]]
* [http://www.chessprogramming.net/fruit-reloaded/ Fruit Reloaded - Computer Chess Programming] hosted by [[Steve Maughan]]
* [https://hjetten.home.xs4all.nl/scan/scan.html Scan] hosted by [[Harm Jetten]]

=References=
<references />

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