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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 [[:Category: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>.

In March 2014, ten years after the initial Fruit 1.0 release, Fabien announced and published his new [[:Category: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>.