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Fabien Letouzey 1
- Photos WCCC 2005 by Gerd Isenberg↩︎
Fabien Letouzey,
a French computer chess and games programmer and developer of the chess programs Fruit 1, Chess-64 2 and Senpai, the Othello programs Turtle, Snail 3, Piloth 4, Decapus (10x10) and Octopus (8x8), the latter Gold medal winners at the 20th Computer Olympiad, Leiden 2017, the UCI-Winboard adapter PolyGlot, and the International Draughts programs Toy 5, and Scan, which surprised the Draughts scene in winning the 18th Computer Olympiad, Leiden 2015, and defended its title in 2016 and 2017 respectively. Fabien further works with Rémi Coulom to improve his Go playing program Crazy Stone due to deep learning 6.
Contents
Fruit
The release of Fruit until version 2.1 under GNU General Public License was a "revolution" in computer chess in 2005 - an 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 7 by Thomas Gaksch. Fabien finished his commercial computer chess career so far in 2007 8. Fruit 2.3+ is non GPL with full rights given to Ryan Benitez, while Fruit 2.1 is now owned by the Free Software Foundation 9.
Anniversary
In March 2014, ten years after the initial Fruit 1.0 release, Fabien announced and published his new open source engine Senpai 10, and an independent fork of Fruit 2.1, Fruit Reloaded by Fabien Letouzey, Daniel Mehrmann and Ryan Benitez 11, both hosted by Steve Maughan's Computer Chess Programming 12 13.
Photos
Fruit
Winners 2005, Stefan Meyer-Kahlen, Fabien Letouzey, Anthony Cozzie and Gian-Carlo Pascutto
Scan
14 15 
10 years later, Fabien's program Scan won 10x10 Draughts at the 18th Computer Olympiad 16 17
and defended its title at the 19th and 20th Computer Olympiad so far
Selected Publications
1999
- Francesco de Comité, François Denis, Rémi Gilleron, Fabien Letouzey (1999). Positive and Unlabeled Examples help Learning. The 10th International Conference on Algorithmic Learning Theory, available as ps
2000 ...
- Fabien Letouzey, François Denis, Rémi Gilleron (2000). Learning from Positive and Unlabeled Examples. ALT 2000: 71-85, available as ps
- François Denis, Rémi Gilleron, Fabien Letouzey (2005). Learning from positive and unlabeled examples. Theoretical Computer Science, Vol. 348, No. 1
2010 ...
- Ching-Nung Lin, Fabien Letouzey, Shi-Jim Yen (2019). Decapus wins Othello 10 × 10 tournament. ICGA Journal, Vol. 41, No. 1 » 21st Computer Olympiad 2018
Forum Posts
2000 ...
- calculating the PV using MTD by Fabien Letouzey, CCC, September 11, 2002 » MTD(f), Principal Variation
- Re: Fruit - Question for Fabien by Fabien Letouzey, CCC, March 11, 2004 » Node Types, Transposition Table, Principal Variation Search
- Fruit, trying to answer various missed posts by Fabien Letouzey, CCC, March 15, 2004
- Fruit 1.0 UCI (with source code) now available by Fabien Letouzey, CCC, March 17, 2004
2005 ...
- Safe I/O (repeated) by Fabien Letouzey, Winboard Forum, February 11, 2005
- To Fruit's author Fabien Letouzey and commercial manager Joachim Rang by Marc Lacrosse, CCC, November 17, 2005
2010 ...
- Fabien's open letter to the community by Tord Romstad, CCC, January 23, 2011 19 » Fabien Rybka Letter
- Fabien's open letter to the community by Tord Romstad, OpenChess Forum, January 23, 2011
- Interview with Fabien (from the year 2005) ... by Frank Quisinsky, CCC, January 25, 2011
- What is a derivative? by Fabien Letouzey, CCC, January 27, 2011 » Clones
- GPL / GNU Licence enforcement by Fabien Letouzey, CCC, January 27, 2011 » Free Software Foundation
- Programming language features for computer chess by Fabien Letouzey, CCC, January 27, 2011
- Senpai 1.0 (new engine) by Fabien Letouzey, CCC, March 17, 2014
- Fruit 1.0 anniversary by Fabien Letouzey, CCC, March 17, 2014
2015 ...
- Re: Draughts at the ICGA Olympiad by Fabien Letouzey, CCC, April 30, 2015
- A little more info about Scan by Fabien Letouzey by Jesús Muñoz, CCC, July 06, 2015
- Scan by Fabien Letouzey, World Draughts Forum, July 08, 2015
External Links
- Fabien Letouzey's ICGA Tournaments
- The alternative to Crafty, Interview with Fabien Letouzey by Frank Quisinsky, Arena Chess GUI 3.0 - Archive , Page 7, 96, April 05, 2005, also hosted by Ed Schröder 20
- Senpai Chess Engine - Computer Chess Programming hosted by Steve Maughan
- Fruit Reloaded - Computer Chess Programming hosted by Steve Maughan
- Scan hosted by Harm Jetten
References
Re: Congratulations to Anthony ! by Ryan Benitez, CCC, September 27, 2007↩︎
Fabien Letouzey, othello programmer of Snail, Turtle and Piloth.↩︎
Toy by Fabien Letouzey from All 10x10 programs in the world↩︎
Behind the scenes of Fine Art with report on Computer Go UEC Cup, March 2017 @ 9:00↩︎
Toga II by Thomas Gaksch and Fabien Letouzey↩︎
Re: When will come a new Toga Engine? by Ryan Benitez from CCC, April 10, 2009↩︎
Senpai 1.0 (new engine) by Fabien Letouzey, CCC, March 17, 2014↩︎
Fruit 1.0 anniversary by Fabien Letouzey, CCC, March 17, 2014↩︎
Senpai Chess Engine - Computer Chess Programming hosted by Steve Maughan↩︎
Fruit Reloaded - Computer Chess Programming hosted by Steve Maughan↩︎
Draughts at the ICGA Olympiad by Harm Geert Muller, CCC, April 30, 2015↩︎
Computer Olympiad 2015 Leiden by Bert Tuyt, World Draughts Forum, May 01, 2015↩︎
Image from the 18th Computer Olympiad, 2015 by Gerd Isenberg↩︎
Interview with Fabien (from the year 2005) ... by Frank Quisinsky, CCC, January 25, 2011↩︎
