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[[FILE:BakAfterThePerquisition1994.jpg|border|right|thumb| [[Arts#:Category:Samuel Bak|Samuel Bak]] - After the Perquisition, 1994

until Version 2.1 [[:Category:Open Source Engines|open source]], is a groundbreaking [[UCI]] compatible chess engine developed by primary author [[Fabien Letouzey]]. It made its first appearance to the public in March 2004, when Fruit was a basic program with a very simple [[Evaluation |evaluation]] and basic [[Search|search]]. However, since then it made progress adding about 100 Elo to each new release (1.5, 2.0, 2.1 and Fruit 2.2) <ref>[http://www.fruitchess.com/about.htm Fruit - pure playing strength - Team / History]</ref>.

Beside Fabien Letouzey as primary author and [[:Category:Opening Book AuthorsAuthor|opening book author]] [[Marc Lacrosse]], [[Ryan Benitez]] joined the Fruit-Team in December 2005. Before he developed [[Gambit Fruit]] with some interesting changes on the basis of the last open-source-version 2.1. [[Joachim Rang]] was the main tester of Fruit since its first public appearance, tuned parameters, and tested evaluation and search features <ref>[http://www.fruitchess.com/about.htm Fruit - pure playing strength - Team / History]</ref> .

Yes, the publication of Fruit 2.1 was huge. Look at how many engines took a massive jump in its wake: [[Rybka]], [[HiarcsHIARCS]], [[Fritz]], [[Zappa]], [[Spike]], [[List (programProgram)|List]], and so on. I went through the Fruit 2.1 source code forwards and backwards and took many things.

In March 2014, ten years after the initial Fruit 1.0 release, [[Daniel Mehrmann]] initiated a "let's update Fruit" called [[Fruit Reloaded]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=51638 Fruit 1.0 anniversary] by [[Fabien Letouzey]], [[CCC]], March 17, 2014</ref>. With some help from [[Ryan Benitez]], the aim is to add [[Parallel Search|SMP]] to Fruit and upgrade search and [[Evaluation|evaluation]] with modern techniques <ref>[https://github.com/Akusari/Fruit-reloaded-public Akusari/Fruit-reloaded-public · GitHub]</ref> <ref>[http://www.chessprogramming.net/fruit-reloaded/ Fruit Reloaded - Computer Chess Programming] hosted by [[Steve Maughan]]</ref>. Simultaneously, Fabien Letouzey waved goodbye to Fruit and published his new [[:Category:Open Source Engines|open source engine]] [[Senpai]], also with [[Ryan Benitez]] and [[Joachim Rang]] involved <ref>[http://www.talkchess.com/forum/viewtopic.php?t=51637 Senpai 1.0 (new engine)] by [[Fabien Letouzey]], [[CCC]], March 17, 2014</ref>.

* [https://www.stmintz.com/ccc/index.php?id=354012 Fruit - Question for Fabien] by [[Dan Honeycutt]], [[CCC]], March 11, 2004 » [[Node Types]], [[Transposition Table]], [[Principal variationVariation]], [[Principal Variation Search]]

* [https://www.stmintz.com/ccc/index.php?id=483065 SSDF(Hiarcs 10 - Fruit 2.2.1)A1200, 1-2, ended 19-21] by [[Tony Hedlund]], [[CCC]], January 29, 2006 » [[SSDF]], [[HiarcsHIARCS]]

* [http://www.talkchess.com/forum/viewtopic.php?t=13446 SSDF(Hiarcs 11.1 - Fruit 2.2.1)A1200, 12-7, ended 24-24] by [[Tony Hedlund]], April 28, 2007 » [[SSDF]], [[HiarcsHIARCS]]

* [https://web.archive.org/web/20180828211326/http://www.chessvibes.com/?q=reports/attack-of-the-clones Attack of the clones | ChessVibes] by [[David Levy]], 19 February, 2011([https://en.wikipedia.org/wiki/Wayback_Machine Wayback Machine])* [https://web.archive.org/web/20180820105430/http://www.chessvibes.com/?q=reports/programmers-write-open-letter-about-rybka-fruit-issue Programmers write open letter about Rybka-Fruit issue | ChessVibes] by [http://www.chessvibes.com/?q=peterdoggers [Peter Doggers]], March 01, 2011([https://en.wikipedia.org/wiki/Wayback_Machine Wayback Machine])