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Created page with "'''Home * Engines * Sjeng''' '''Sjeng''',<br/> an open source engine written by Gian-Carlo Pascutto with help from Adrien Re..."
'''[[Main Page|Home]] * [[Engines]] * Sjeng'''
'''Sjeng''',<br/>
an [[:Category:Open Source|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]] <ref>[http://sjeng.org/indexold.html Sjeng : a chess-and-variants playing program - 7. Who wrote Sjeng ?]</ref>. Sjeng was initially based on [[Faile|Faile 0.6]] by [[Adrien Regimbald]] <ref>[https://www.stmintz.com/ccc/index.php?id=195551 Re: Dutch CC all games available] by [[Gian-Carlo Pascutto]], [[CCC]], November 04, 2001</ref>, and an attempt to create a [[Bughouse]] & [[Crazyhouse]] playing program. Sjeng 7 became open source under the [[Free Software Foundation#GPL|GPL]], also playing [[Chess|standard]] and [[Losing Chess|Antichess]] <ref>[http://ilk.uvt.nl/icga/games/losingchess/ ICGA: Losing Chess] by [[Guy Haworth]]</ref>. The [[Chess Engine Communication Protocol]] compliant Sjeng 11.2 was the final open source program released in January 2002 <ref>[http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/66707061247326df Sjeng 12.7 and 11.2 released] by [[Gian-Carlo Pascutto]], [[Computer Chess Forums|rgcc]], January 2, 2002</ref>, 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|Lex Loep's]] [[Lokasoft]] <ref>[http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/261bfb217175033a Deep Sjeng 1.0 released] by [[Lex Loep|Lex]], [[Computer Chess Forums|rgcc]], March 3, 2003</ref>.
=Description=
In it's [[Losing Chess|suicide and loser's]] mode, Sjeng applies [[Proof-Number Search|proof-number search]]. Otherwise it uses [[Alpha-Beta|alpha-beta]] with [[Aspiration Windows|aspiration window]] and [[Principal Variation Search|PVS]], [[History Heuristic|history heuristic]], [[Killer Heuristic|killer heuristic]], [[Transposition Table|transposition tables]], [[Static Exchange Evaluation|SEE]] for [[Move Ordering|move ordering]] and [[Pruning|pruning]], [[Extensions|selective extensions]], [[Null Move Pruning#AdaptiveNullMovePruning|adaptive null move pruning]], [[Futility Pruning#Extendedfutilitypruning|extended futility pruning]], [[Razoring#LimitedRazoring|limited razoring]], and [[Book Learning|opening book learning]] <ref>[http://sjeng.org/download.html Sjeng Download - Readme]</ref>. Sjeng is the engine of [[Apple|Apple's]] chess application as shipped in [[Mac OS|MacOS X 10.4]] <ref>[https://en.wikipedia.org/wiki/Chess_%28application%29 Chess (application) from Wikipedia]</ref> <ref>[http://www.opensource.apple.com/source/Chess/Chess-110.0.6/ Chess - Source Browser]</ref> <ref>[http://www.opensource.apple.com/source/Chess/Chess-110.0.6/README README]</ref>.
=Etymology=
The name Sjeng, which is also a [https://en.wikipedia.org/wiki/Limburgish_language Limburgish] masculine given name, is the reverse of the long time number one human Bughouse player, with the handle "Gnejs" <ref>[https://www.stmintz.com/ccc/index.php?id=298890 Yes, there are] by [[Georg von Zimmermann]], [[CCC]], June 01, 2003</ref> <ref>[[Eric van Reem]] ('''2001'''). ''Tiger und Rebel gleichauf in Leiden''. [[Computerschach und Spiele]], 6/2001 (German) </ref>.
=See also=
* [[Deep Sjeng]]
* [[Various Classifications#GivenName|Given Name]]
=Forum Posts=
==2000 ...==
* [https://www.stmintz.com/ccc/index.php?id=106176 Sjeng 7 out - with sources now (GPL)] by [[Gian-Carlo Pascutto]], [[CCC]], April 15, 2000
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/b9ebbbdba6c8b9f3 Sjeng 10 has been released] by [[Gian-Carlo Pascutto]], [[Computer Chess Forums|rgcc]], June 7, 2001
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/66707061247326df Sjeng 12.7 and 11.2 released] by [[Gian-Carlo Pascutto]], [[Computer Chess Forums|rgcc]], January 2, 2002
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/1d26baa93648f128 Sjeng 12.10 released (UCI support!)] by [[Gian-Carlo Pascutto]], [[Computer Chess Forums|rgcc]], March 22, 2002
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/2989a0b857e92c94 Sjeng 12.11 Released] by [[Gian-Carlo Pascutto]], [[Computer Chess Forums|rgcc]], April 2, 2002
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/fe2e9d80451eb343 sjeng's suicide tablebases] by [[Jean Efpraxiadis]], [[Computer Chess Forums|rgcc]], July 11, 2002
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=45003 Sjeng 11.2 and suicide chess] by [[Michel Van den Bergh]], [[CCC]], September 03, 2012
=External Links=
==Chess Engine==
* [https://www.game-ai-forum.org/icga-tournaments/program.php?id=72 Sjeng's ICGA Tournaments] (includes [[Deep Sjeng]])
* [http://sjeng.org/indexold.html Sjeng : a chess-and-variants playing program]
* [https://github.com/gcp/sjeng GitHub - gcp/sjeng: A chess and chess variants playing program]
* [https://en.wikipedia.org/wiki/Sjeng_%28Chess%29 Sjeng (Chess) from Wikipedia]
* [http://wbec-ridderkerk.nl/html/details1/Sjeng.html Sjeng] from [[WBEC|WBEC Ridderkerk]]
==Chess Variants==
* [https://en.wikipedia.org/wiki/Antichess Antichess from Wikipedia]
* [https://en.wikipedia.org/wiki/Bughouse_chess Bughouse chess from Wikipedia]
* [https://en.wikipedia.org/wiki/Crazyhouse Crazyhouse from Wikipedia]
==Misc==
* [https://en.wikipedia.org/wiki/Sjeng Sjeng (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Sjeng_%28name%29 Sjeng (name) from Wikipedia]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:WinBoard]]
[[Category:XBoard]]
'''Sjeng''',<br/>
an [[:Category:Open Source|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]] <ref>[http://sjeng.org/indexold.html Sjeng : a chess-and-variants playing program - 7. Who wrote Sjeng ?]</ref>. Sjeng was initially based on [[Faile|Faile 0.6]] by [[Adrien Regimbald]] <ref>[https://www.stmintz.com/ccc/index.php?id=195551 Re: Dutch CC all games available] by [[Gian-Carlo Pascutto]], [[CCC]], November 04, 2001</ref>, and an attempt to create a [[Bughouse]] & [[Crazyhouse]] playing program. Sjeng 7 became open source under the [[Free Software Foundation#GPL|GPL]], also playing [[Chess|standard]] and [[Losing Chess|Antichess]] <ref>[http://ilk.uvt.nl/icga/games/losingchess/ ICGA: Losing Chess] by [[Guy Haworth]]</ref>. The [[Chess Engine Communication Protocol]] compliant Sjeng 11.2 was the final open source program released in January 2002 <ref>[http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/66707061247326df Sjeng 12.7 and 11.2 released] by [[Gian-Carlo Pascutto]], [[Computer Chess Forums|rgcc]], January 2, 2002</ref>, 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|Lex Loep's]] [[Lokasoft]] <ref>[http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/261bfb217175033a Deep Sjeng 1.0 released] by [[Lex Loep|Lex]], [[Computer Chess Forums|rgcc]], March 3, 2003</ref>.
=Description=
In it's [[Losing Chess|suicide and loser's]] mode, Sjeng applies [[Proof-Number Search|proof-number search]]. Otherwise it uses [[Alpha-Beta|alpha-beta]] with [[Aspiration Windows|aspiration window]] and [[Principal Variation Search|PVS]], [[History Heuristic|history heuristic]], [[Killer Heuristic|killer heuristic]], [[Transposition Table|transposition tables]], [[Static Exchange Evaluation|SEE]] for [[Move Ordering|move ordering]] and [[Pruning|pruning]], [[Extensions|selective extensions]], [[Null Move Pruning#AdaptiveNullMovePruning|adaptive null move pruning]], [[Futility Pruning#Extendedfutilitypruning|extended futility pruning]], [[Razoring#LimitedRazoring|limited razoring]], and [[Book Learning|opening book learning]] <ref>[http://sjeng.org/download.html Sjeng Download - Readme]</ref>. Sjeng is the engine of [[Apple|Apple's]] chess application as shipped in [[Mac OS|MacOS X 10.4]] <ref>[https://en.wikipedia.org/wiki/Chess_%28application%29 Chess (application) from Wikipedia]</ref> <ref>[http://www.opensource.apple.com/source/Chess/Chess-110.0.6/ Chess - Source Browser]</ref> <ref>[http://www.opensource.apple.com/source/Chess/Chess-110.0.6/README README]</ref>.
=Etymology=
The name Sjeng, which is also a [https://en.wikipedia.org/wiki/Limburgish_language Limburgish] masculine given name, is the reverse of the long time number one human Bughouse player, with the handle "Gnejs" <ref>[https://www.stmintz.com/ccc/index.php?id=298890 Yes, there are] by [[Georg von Zimmermann]], [[CCC]], June 01, 2003</ref> <ref>[[Eric van Reem]] ('''2001'''). ''Tiger und Rebel gleichauf in Leiden''. [[Computerschach und Spiele]], 6/2001 (German) </ref>.
=See also=
* [[Deep Sjeng]]
* [[Various Classifications#GivenName|Given Name]]
=Forum Posts=
==2000 ...==
* [https://www.stmintz.com/ccc/index.php?id=106176 Sjeng 7 out - with sources now (GPL)] by [[Gian-Carlo Pascutto]], [[CCC]], April 15, 2000
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/b9ebbbdba6c8b9f3 Sjeng 10 has been released] by [[Gian-Carlo Pascutto]], [[Computer Chess Forums|rgcc]], June 7, 2001
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/66707061247326df Sjeng 12.7 and 11.2 released] by [[Gian-Carlo Pascutto]], [[Computer Chess Forums|rgcc]], January 2, 2002
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/1d26baa93648f128 Sjeng 12.10 released (UCI support!)] by [[Gian-Carlo Pascutto]], [[Computer Chess Forums|rgcc]], March 22, 2002
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/2989a0b857e92c94 Sjeng 12.11 Released] by [[Gian-Carlo Pascutto]], [[Computer Chess Forums|rgcc]], April 2, 2002
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/fe2e9d80451eb343 sjeng's suicide tablebases] by [[Jean Efpraxiadis]], [[Computer Chess Forums|rgcc]], July 11, 2002
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=45003 Sjeng 11.2 and suicide chess] by [[Michel Van den Bergh]], [[CCC]], September 03, 2012
=External Links=
==Chess Engine==
* [https://www.game-ai-forum.org/icga-tournaments/program.php?id=72 Sjeng's ICGA Tournaments] (includes [[Deep Sjeng]])
* [http://sjeng.org/indexold.html Sjeng : a chess-and-variants playing program]
* [https://github.com/gcp/sjeng GitHub - gcp/sjeng: A chess and chess variants playing program]
* [https://en.wikipedia.org/wiki/Sjeng_%28Chess%29 Sjeng (Chess) from Wikipedia]
* [http://wbec-ridderkerk.nl/html/details1/Sjeng.html Sjeng] from [[WBEC|WBEC Ridderkerk]]
==Chess Variants==
* [https://en.wikipedia.org/wiki/Antichess Antichess from Wikipedia]
* [https://en.wikipedia.org/wiki/Bughouse_chess Bughouse chess from Wikipedia]
* [https://en.wikipedia.org/wiki/Crazyhouse Crazyhouse from Wikipedia]
==Misc==
* [https://en.wikipedia.org/wiki/Sjeng Sjeng (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Sjeng_%28name%29 Sjeng (name) from Wikipedia]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:WinBoard]]
[[Category:XBoard]]
