Gambit Fruit

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Gambit Fruit, a GPL licensed, Fruit and Toga derivative open source engine written by Ryan Benitez in C++. It has some interesting changes primarily based on the last open-source-version Fruit 2.1, the goal being a fun free and aggressive chess engine. Short after its release in end of 2005, Ryan joined forces with Fabien Letouzey and Joachim Rang for a commercial Fruit, and incorporated Gambit Fruit features into Fruit 2.2 and subsequent versions.

=Added Features= and changes in Gambit Fruit:
 * Alternate piece-square tables
 * Rook pawn score adjustment
 * Rook Bishop bonus
 * Queen Knight bonus
 * Two Rook penalty
 * Two Knight penalty
 * Minor tuning of piece values
 * King tropism
 * Side to move bonus
 * Rook on bad pawn file bonus
 * Pawns on Bishop colour penalty (fewer pawns is better for bishops and with one bishop you should not block it with your own pawns)
 * Improved pawn structure
 * New Lazy Eval
 * Rebel reductions with re-searches
 * Bitbases (using Scorpio bitbase files)
 * Contempt factor

=Acknowledgment= Thank you to Fabian for Fruit 2.1, Thomas for Toga, and to Bryan Hofmann for the Windows compile.

=See also=
 * Fruit
 * Gambiet
 * Gambit
 * GambitVB
 * Gambit Tiger
 * Kasparov's Gambit
 * Toga

=Forum Posts=
 * Re: Gambit Fruit ? by Ryan B., CCC, November 15, 2005
 * Has anyone tested Gambit Fruit with Rebel Reductions on? by Ryan B., CCC, November 15, 2005 » Reductions, Rebel
 * Gambit Fruit Beta 3 available by Ryan B., CCC, November 19, 2005
 * Gambit Fruit 1.0 Beta 4b is out now by Ryan Benitez, Winboard Forum, December 02, 2005
 * congratulations to gambit-fruit! by Thorsten Czub, CCC, January 13, 2006
 * Chess engine oldies upgrades by Denis P. Mendoza, Toga Developers Discussion Board, December 30, 2008
 * posix source for GambitFruit4bxSE ? by Martin Helmer, CCC, January 28, 2009

=External Links=
 * Fruit - pure playing strength - Team / History
 * GitHub - lazydroid/gambit-fruit: Open source chess engine based on Fruit 2.1
 * Fruit (software) - Derivatives from Wikipedia

=References=

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