Antichess

Antichess, also called losing chess, loser's chess, zero chess, giveaway chess, suicide chess, or take me is a chess variant in which the objective of the participants is to get all of their pieces captured. The most widely played variation, as described in the book "Popular Chess Variants" by D.B. Pritchard, is described below.

The rules of the game are the same as those of chess except for the following additional rules:

*Capturing is compulsory.
*When more than one capture is available, the player may exercise choice.
*The king has no special prerogative and accordingly:
**It may be captured like any other piece.
**There is no check or checkmate.
**There is no Castling.
**Pawns may also promote to King.
*In the case of stalemate, there are different rules:
**It is a win for the stalemated player (international rules).
**It is a draw (AISE rules).
**It is a win for the player with the fewer number of pieces, and if both have the same number it is a draw. The type of the piece makes no difference (FICS rules).

A player wins by losing all his pieces, or being stalemated (as detailed.) Apart from move repetition, mutual accord and the fifty move rule, the game is also drawn when a win is impossible; for example, if a dark-squared bishop and a light-squared bishop are the only pieces remaining. In another little-played version, forcing your opponent to checkmate your king is another option to win.

Chess diagram|=
tright
P.H. Törngren
"Tidskrift för Schack" 1929 |=

8 | | | | | | | | |= 7 | | | | | | | | |= 6 |pd| | | | | | | |= 5 | | | | | | | | |= 4 | | | | | | | | |= 3 | | | | | | | | |= 2 | | | | | | | |pl|= 1 | | | | | | | | |= a b c d e f g h

Suicide chess, white to play and win.
Solution goes: 1.h3! a5 2.h4 a4 3.h5 a3 4.h6 a2 5.h7 a1R! 6.h8B!! R"anywhere" 7. Ba1 Rxa1 1-0Because of the forced capture rule, antichess games often involve long sequences of forced captures by one player. This means that a minor mistake can ruin the whole game. Losing openings include 1.d3, 1.d4, 1.e4, 1.f4, 1.h3, 1.h4, 1.Nf3 and 1.Nc3.Fact|date=May 2008 Some of these openings took months of computer time to solve, but the wins against 1.d3, 1.d4, and 1.e4 consist of a single series of forced captures, and can be played from memory by most experienced players.

ee also

* chess terminology

External links

* [http://freshmeat.net/projects/kpanta/ AntiChess Game for Linux]
* [http://www.cs.unimaas.nl/icga/games/losingchess Losing Chess Information]
* [http://catalin.francu.com/nilatac/book.php Nilatac's Opening Book]
* [http://sourceforge.net/projects/antichess AntiChess Java application] , open source
* [http://www.pion.ch/Losing/index.html The complete review of suicide chess by Fabrice Liardet]
* [http://www.matf.bg.ac.yu/~andrew/suicide An interesting look on suicide chess by Vladimir Andrejic]
* [http://www.matf.bg.ac.yu/~andrew/suicide/StanGold/Index.htm Web site of Stan Goldovski, pioneer of suicide chess]
* [http://pil.phys.uniroma1.it/~zapperi/chess/vinciperdi.htm The site of Italian fics suicide player Vinciperdi in Italian] ; [http://translate.google.com/translate?u=http%3A%2F%2Fpil.phys.uniroma1.it%2F%7Ezapperi%2Fchess%2Fvinciperdi.htm&langpair=it%7Cen&hl=fr&ie=UTF-8&oe=UTF-8&prev=%2Flanguage_tools English translation by Google]
* [http://www.wildchess.org/ Suicide and Losers Chess database]
* [http://www.suicidechess.ca/ SuicideChess]

Internet sites where antichess can be played

*FICS
*ICC
*Playchess
* [http://3moves.net/ 3moves.net]
* [http://www.brainking.com/ Brain King]
* [http://www.goldtoken.com/ GoldToken]
* [http://www.itsyourturn.com/ It's Your Turn]
* [http://www.schemingmind.com/ SchemingMind]
* [http://www.buho21.com/ Buho21]
* [http://www.chesspark.com/ Chesspark]