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Created page with "'''Home * Games * Losing Chess''' '''Losing Chess''', (Antichess, Giveaway Chess, Suicide Chess, Killer Chess, LC)<br/> a chess variant i..."
'''[[Main Page|Home]] * [[Games]] * Losing Chess'''
'''Losing Chess''', (Antichess, Giveaway Chess, Suicide Chess, Killer Chess, LC)<br/>
a [[Chess#Variants|chess variant]] in which the objective of each player is to have no [[Moves|moves]], that is to lose all of his [[Pieces|pieces]] or be [[Stalemate|stalemated]]. There are variations called LC1, LC2, LC3 and LC4, in the 'International' ruleset LC1, capturing is compulsory, the [[King]] is an ordinary piece to which a [[Pawn]] can [[Promotions|promote]], and there is no [[Castling|castling]], [[Check|check]] and [[Checkmate|checkmate]]. In the [[FICS]] version LC2, a stalemate means that the side with least pieces wins <ref>[http://ilk.uvt.nl/icga/games/losingchess/ Losing Chess] by [[Guy Haworth]], [[ICGA]]</ref>.
=Solving=
Since late 2011 [[Mark Watkins]] worked on his long-term goal to [https://en.wikipedia.org/wiki/Solved_game#Weak weakly solve] the game of [[Losing Chess]], presumably by showing that 1. e3 wins for White. As of summer 2014 <ref>[[Mark Watkins]] ('''2014'''). ''Solved Openings in Losing Chess''. [[ICGA Journal#37_2|ICGA Journal, Vol. 37, No. 2]]</ref>, leaving b6 and c5 as the remaining Black responses <ref>[http://www.jsbeasley.co.uk/losinge3e6.htm Losing Chess 1 e3 e6] by [[John Beasley]], August 2014</ref>, all other responses to 1.e3 are indeed White wins, along with earlier work done by [[Ben Nye]] and others, as demonstrated by [[Proof-Number Search]] combined with [[Endgame Tablebases]]. On February 02, 2015, 1. e3 c5 was announced solved, on October 10, 2016, 1. e3 b6, proving 1.e3 wins <ref>[http://www.open-chess.org/viewtopic.php?f=3&t=3023 Losing Chess: 1. e3 wins] by [[Mark Watkins|BB+]], [[Computer Chess Forums|OpenChess Forum]], October 10, 2016</ref>.
=Engines=
* [[Pulsar]]
* [[PyChess]]
* [[Rival]]
* [[Sjaak]]
* [[Sjeng]]
* [[Zillions of Games]]
=See also=
* [[Proof-Number Search]]
=Publications=
* [[John Beasley]] ('''2001'''). ''Computer Discoveries in Losing Chess''. [[ICGA Journal#24_2|ICGA Journal, Vol. 24, No. 2]]
* [[Sacha Droste]], [[Johannes Fürnkranz]] ('''2008'''). ''Learning of Piece Values for Chess Variants.'' Technical Report TUD–KE–2008-07, Knowledge Engineering Group, [[Darmstadt University of Technology|TU Darmstadt]], [http://www.ke.tu-darmstadt.de/publications/reports/tud-ke-2008-07.pdf pdf]
* [[Sacha Droste]], [[Johannes Fürnkranz]] ('''2008'''). ''Learning the Piece Values for three Chess Variants''. [[ICGA Journal#31_4|ICGA Journal, Vol. 31, No. 4]]
* [[Mark Watkins]] ('''2012'''). ''A status report on Losing Chess''. [http://magma.maths.usyd.edu.au/~watkins/LOSING_CHESS/losing.pdf pdf]
* [[Mark Watkins]] ('''2014'''). ''Solved Openings in Losing Chess''. [[ICGA Journal#37_2|ICGA Journal, Vol. 37, No. 2]], [http://magma.maths.usyd.edu.au/~watkins/LOSING_CHESS/losing2014.pdf preprint as pdf]
* [[Mark Watkins]] ('''2017'''). ''Losing Chess: 1. e3 Wins for White''. [[ICGA Journal#39_2|ICGA Journal, Vol. 39, No. 2]]
=Forum Posts=
* [http://www.open-chess.org/viewtopic.php?f=3&t=3023 Losing Chess: 1. e3 wins] by [[Mark Watkins|BB+]], [[Computer Chess Forums|OpenChess Forum]], October 10, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=61684 Losing chess / suicide chess (weakly) solved] by [[Ronald de Man]], [[CCC]], October 11, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=61832 Suicide chess tablebases (stalemated player wins)] by [[Niklas Fiekas]], [[CCC]], October 25, 2016 » [[Syzygy Bases]]
=External Links=
* [https://en.wikipedia.org/wiki/Losing_chess Losing chess from Wikipedia]
* [http://ilk.uvt.nl/icga/games/losingchess/ Losing Chess] by [[Guy Haworth]], [[ICGA]]
* [http://www.jsbeasley.co.uk/ The John and Sue Beasley WebSite]
* [http://www.chessvariants.org/diffobjective.dir/giveaway.html Losing Chess] by [[Hans Bodlaender]], [https://en.wikipedia.org/wiki/The_Chess_Variant_Pages The Chess Variant Pages]
* [http://poincare.matf.bg.ac.rs/~andrew/suicide/StanGold/Index.htm Losing Chess Page] by [[Stan Goldovski]]
* [https://www.unix-ag.uni-kl.de/~chess/gicshelp/node198.html Suicide Chess Rules - Unix-AG]
* [http://magma.maths.usyd.edu.au/~watkins/LOSING_CHESS/ Losing Chess] by [[Mark Watkins]]
=References=
<references />
'''[[Games|Up one Level]]'''
'''Losing Chess''', (Antichess, Giveaway Chess, Suicide Chess, Killer Chess, LC)<br/>
a [[Chess#Variants|chess variant]] in which the objective of each player is to have no [[Moves|moves]], that is to lose all of his [[Pieces|pieces]] or be [[Stalemate|stalemated]]. There are variations called LC1, LC2, LC3 and LC4, in the 'International' ruleset LC1, capturing is compulsory, the [[King]] is an ordinary piece to which a [[Pawn]] can [[Promotions|promote]], and there is no [[Castling|castling]], [[Check|check]] and [[Checkmate|checkmate]]. In the [[FICS]] version LC2, a stalemate means that the side with least pieces wins <ref>[http://ilk.uvt.nl/icga/games/losingchess/ Losing Chess] by [[Guy Haworth]], [[ICGA]]</ref>.
=Solving=
Since late 2011 [[Mark Watkins]] worked on his long-term goal to [https://en.wikipedia.org/wiki/Solved_game#Weak weakly solve] the game of [[Losing Chess]], presumably by showing that 1. e3 wins for White. As of summer 2014 <ref>[[Mark Watkins]] ('''2014'''). ''Solved Openings in Losing Chess''. [[ICGA Journal#37_2|ICGA Journal, Vol. 37, No. 2]]</ref>, leaving b6 and c5 as the remaining Black responses <ref>[http://www.jsbeasley.co.uk/losinge3e6.htm Losing Chess 1 e3 e6] by [[John Beasley]], August 2014</ref>, all other responses to 1.e3 are indeed White wins, along with earlier work done by [[Ben Nye]] and others, as demonstrated by [[Proof-Number Search]] combined with [[Endgame Tablebases]]. On February 02, 2015, 1. e3 c5 was announced solved, on October 10, 2016, 1. e3 b6, proving 1.e3 wins <ref>[http://www.open-chess.org/viewtopic.php?f=3&t=3023 Losing Chess: 1. e3 wins] by [[Mark Watkins|BB+]], [[Computer Chess Forums|OpenChess Forum]], October 10, 2016</ref>.
=Engines=
* [[Pulsar]]
* [[PyChess]]
* [[Rival]]
* [[Sjaak]]
* [[Sjeng]]
* [[Zillions of Games]]
=See also=
* [[Proof-Number Search]]
=Publications=
* [[John Beasley]] ('''2001'''). ''Computer Discoveries in Losing Chess''. [[ICGA Journal#24_2|ICGA Journal, Vol. 24, No. 2]]
* [[Sacha Droste]], [[Johannes Fürnkranz]] ('''2008'''). ''Learning of Piece Values for Chess Variants.'' Technical Report TUD–KE–2008-07, Knowledge Engineering Group, [[Darmstadt University of Technology|TU Darmstadt]], [http://www.ke.tu-darmstadt.de/publications/reports/tud-ke-2008-07.pdf pdf]
* [[Sacha Droste]], [[Johannes Fürnkranz]] ('''2008'''). ''Learning the Piece Values for three Chess Variants''. [[ICGA Journal#31_4|ICGA Journal, Vol. 31, No. 4]]
* [[Mark Watkins]] ('''2012'''). ''A status report on Losing Chess''. [http://magma.maths.usyd.edu.au/~watkins/LOSING_CHESS/losing.pdf pdf]
* [[Mark Watkins]] ('''2014'''). ''Solved Openings in Losing Chess''. [[ICGA Journal#37_2|ICGA Journal, Vol. 37, No. 2]], [http://magma.maths.usyd.edu.au/~watkins/LOSING_CHESS/losing2014.pdf preprint as pdf]
* [[Mark Watkins]] ('''2017'''). ''Losing Chess: 1. e3 Wins for White''. [[ICGA Journal#39_2|ICGA Journal, Vol. 39, No. 2]]
=Forum Posts=
* [http://www.open-chess.org/viewtopic.php?f=3&t=3023 Losing Chess: 1. e3 wins] by [[Mark Watkins|BB+]], [[Computer Chess Forums|OpenChess Forum]], October 10, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=61684 Losing chess / suicide chess (weakly) solved] by [[Ronald de Man]], [[CCC]], October 11, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=61832 Suicide chess tablebases (stalemated player wins)] by [[Niklas Fiekas]], [[CCC]], October 25, 2016 » [[Syzygy Bases]]
=External Links=
* [https://en.wikipedia.org/wiki/Losing_chess Losing chess from Wikipedia]
* [http://ilk.uvt.nl/icga/games/losingchess/ Losing Chess] by [[Guy Haworth]], [[ICGA]]
* [http://www.jsbeasley.co.uk/ The John and Sue Beasley WebSite]
* [http://www.chessvariants.org/diffobjective.dir/giveaway.html Losing Chess] by [[Hans Bodlaender]], [https://en.wikipedia.org/wiki/The_Chess_Variant_Pages The Chess Variant Pages]
* [http://poincare.matf.bg.ac.rs/~andrew/suicide/StanGold/Index.htm Losing Chess Page] by [[Stan Goldovski]]
* [https://www.unix-ag.uni-kl.de/~chess/gicshelp/node198.html Suicide Chess Rules - Unix-AG]
* [http://magma.maths.usyd.edu.au/~watkins/LOSING_CHESS/ Losing Chess] by [[Mark Watkins]]
=References=
<references />
'''[[Games|Up one Level]]'''
