Sjeng

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Sjeng, an open source engine written by Gian-Carlo Pascutto with help from Adrien Regimbald, Daniel Clausen, Dann Corbit, Lenny Taelman, Ben Nye, Ronald de Man, David Dawson, Tim Foden and Georg von Zimmermann. Sjeng was initially based on Faile 0.6 by Adrien Regimbald, and an attempt to create a Bughouse & Crazyhouse playing program. Sjeng 7 became open source under the GPL, also playing standard and Antichess. The Chess Engine Communication Protocol compliant Sjeng 11.2 was the final open source program released in January 2002, while Sjeng 12.7 was closed source, didn't play variants, and emerged to the commercial Deep Sjeng in 2003, initially market by Lex Loep's Lokasoft.

=Description= In it's suicide and loser's mode, Sjeng applies proof-number search. Otherwise it uses alpha-beta with aspiration window and PVS, history heuristic, killer heuristic, transposition tables, SEE for move ordering and pruning, selective extensions, adaptive null move pruning, extended futility pruning, limited razoring, and opening book learning. Sjeng is the engine of Apple's chess application as shipped in MacOS X 10.4.

=Etymology= The name Sjeng, which is also a Limburgish masculine given name, is the reverse of the long time number one human Bughouse player, with the handle "Gnejs".

=See also=
 * Deep Sjeng

=Forum Posts=

2000 ...

 * Sjeng 7 out - with sources now (GPL) by Gian-Carlo Pascutto, CCC, April 15, 2000
 * Sjeng 10 has been released by Gian-Carlo Pascutto, rgcc, June 7, 2001
 * Sjeng 12.7 and 11.2 released by Gian-Carlo Pascutto, rgcc, January 2, 2002
 * Sjeng 12.10 released (UCI support!) by Gian-Carlo Pascutto, rgcc, March 22, 2002
 * Sjeng 12.11 Released by Gian-Carlo Pascutto, rgcc, April 2, 2002
 * sjeng's suicide tablebases by Jean Efpraxiadis, rgcc, July 11, 2002

2010 ...

 * Sjeng 11.2 and suicide chess by Michel Van den Bergh, CCC, September 03, 2012

=External Links=

Chess Engine

 * Sjeng's ICGA Tournaments (includes Deep Sjeng)
 * Sjeng : a chess-and-variants playing program
 * GitHub - gcp/sjeng: A chess and chess variants playing program
 * Sjeng (Chess) from Wikipedia

Chess Variants

 * Antichess from Wikipedia
 * Bughouse chess from Wikipedia
 * Crazyhouse from Wikipedia

Misc

 * Sjeng (disambiguation) from Wikipedia
 * Sjeng (name) from Wikipedia

=References= Up one Level