Crazyhouse

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**Crazyhouse**,
a [[Chess#Variants|chess variant]] which incorporates the [[Shogi]] rule in which a player can drop a [[Captures|captured piece]]. A captured piece reverses its color and goes to the capturing player's reserve or pocket. At any time, instead of making a move with a piece on the board, a player can drop a piece from his reserve onto an empty square on the board <ref>[[https://en.wikipedia.org/wiki/Crazyhouse|Crazyhouse from Wikipedia]]</ref>.

Crazyhouse could be played with [[Zillions of Games]] by [[Jeff Mallett]] and [[Mark Lefler]]. A pioneer in implementing [[Bughouse]] and Crazyhouse with his engine [[Sunsetter]] was [[Georg von Zimmermann]]. More recently, [[Harm Geert Muller]] made the necessary extensions and generalizations of the [[Chess Engine Communication Protocol]] along with its [[XBoard]] and [[WinBoard]] [[GUI|GUIs]] to support Crazyhouse as well as other variants and games <ref>[[http://hgm.nubati.net/|WinBoard 4.7]]</ref> , and also published his new engine [[CrazyWa]] which supports Crazyhouse plus five Shogi variants <ref>[[http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=53808|New crazyhouse engine]] by [[Harm Geert Muller]], [[Computer Chess Forums|Winboard Forum]], December 31, 2016</ref>. [[Multi Variant Stockfish]], a [[Stockfish]] fork maintained by [[Daniel Dugovic]] <ref>[[https://github.com/ddugovic/Stockfish|GitHub - ddugovic/Stockfish: Multi-variant fork of popular UCI chess engine]]</ref> <ref>[[https://github.com/ddugovic/Stockfish/wiki|Home · ddugovic/Stockfish Wiki · GitHub]]</ref>, incorporated in various [[Lichess]] projects <ref>[[https://lichess.org/blog/V7BNKCcAACQA3UmP/stockfish-is-learning|Stockfish is learning | Blog • lichess.org]]</ref> <ref>[[http://www.talkchess.com/forum/viewtopic.php?t=61126|Awesome lichess :-)]] by [[Marco Costalba]], [[CCC]], August 14, 2016</ref>, is able to play Crazyhouse as well. In 8 months, Stockfish-Crazyhouse was improved by 800 Elo points <ref><range type="comment" id="613929073_1">http://35.161.250.236:6543/regression</range id="613929073_1"></ref>. In 2016, [[Ferdinand Mosca]] started to play Crazyhouse tournaments <ref>[[http://www.talkchess.com/forum/viewtopic.php?t=61306|1st CCC World Computer Crazyhouse Championships]] by [[Ferdinand Mosca]], [[CCC]], September 02, 2016</ref> to maintain a rating lists <ref>[[https://sites.google.com/site/zhassociation/|Crazyhouse Chess Variant Association]] by [[Ferdinand Mosca]]</ref>.
[[#Engines]]
=Engines= 
To expand this list of [[Engines|engines]] able to play Losing Chess, create a new engine page with the [[Guidance for Creating New Pages#Tags|tag]] "[[https://chessprogramming.wikispaces.com/tag/view/crazyhouse|crazyhouse]]", or assign the tag to appropriate existing engine pages.
> [[include component="pageList" hideInternal="true" tag="crazyhouse" limit="100"]]

=See also= 
* [[Bughouse]]
* [[Proof-Number Search]]
* [[Shogi]]

=Publications= 
* [[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]]

=Forum Posts= 
==2000 ...== 
* [[http://www.stmintz.com/ccc/index.php?id=148506|programs to play crazyhouse / w23]] by [[Georg von Zimmermann]], [[CCC]], January 06, 2001
* [[http://www.stmintz.com/ccc/index.php?id=173342|Sunsetter(C) source released]] by [[Georg von Zimmermann]], [[CCC]], June 04, 2001
* [[http://www.stmintz.com/ccc/index.php?id=264297|Very interesting crazyhouse position-to Georg Zimmerman (sunsetter test)]] by Lieven Clarisse, [[CCC]], November 11, 2002
==2005 ...== 
* [[http://www.talkchess.com/forum/viewtopic.php?t=17338|Variants and Board Size]] by [[Harm Geert Muller]], [[CCC]], October 25, 2007
* [[http://www.talkchess.com/forum/viewtopic.php?t=17454|BugHouse / CrazyHouse under Winboard]] by [[Harm Geert Muller]], [[CCC]], October 29, 2007
* [[http://www.talkchess.com/forum/viewtopic.php?t=17496|Winboard Crazyhouse alpha testers wanted!]] by [[Harm Geert Muller]], [[CCC]], October 31, 2007
* [[http://www.talkchess.com/forum/viewtopic.php?t=26002|Variant ICS]] by [[Harm Geert Muller]], [[CCC]], January 13, 2009
==2010 ...== 
* [[http://www.talkchess.com/forum/viewtopic.php?t=36329|Shogi now operational on Variant ICS]] by [[Harm Geert Muller]], [[CCC]], October 11, 2010
* [[http://www.talkchess.com/forum/viewtopic.php?t=42984|Xboard crazyhouse problem]] by [[Steven Atkinson]], [[CCC]], March 23, 2012
* [[http://www.talkchess.com/forum/viewtopic.php?t=49320|Piece drops and horizon effect]] by [[Harm Geert Muller]], [[CCC]], September 12, 2013
* [[http://www.talkchess.com/forum/viewtopic.php?t=52663|Creating a crazyhouse opening book for xboard]] by Isaac Haïk Dunn, [[CCC]], June 16, 2014
==2015 ...== 
* [[http://www.talkchess.com/forum/viewtopic.php?t=55763|UCI engins for Suicide, Wild, Crazyhouse...]] by Tasic Vladimir, [[CCC]], March 24, 2015
* [[http://www.talkchess.com/forum/viewtopic.php?t=56196|Crazyhouse]] by [[Ferdinand Mosca]], [[CCC]], May 02, 2015
**2016**
* [[http://www.talkchess.com/forum/viewtopic.php?t=61126|Awesome lichess :-)]] by [[Marco Costalba]], [[CCC]], August 14, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=61306|1st CCC World Computer Crazyhouse Championships]] by [[Ferdinand Mosca]], [[CCC]], September 02, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=61363|Crazyhouse tournaments and rating list]] by [[Ferdinand Mosca]], [[CCC]], September 08, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=61774|Proof-number search]] by [[Harm Geert Muller]], [[CCC]], October 20, 2016 » [[Proof-Number Search]]
* [[http://www.talkchess.com/forum/viewtopic.php?t=61824|QS in Crazyhouse]] by [[Harm Geert Muller]], [[CCC]], October 24, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=61959|Stockfish Crazyhouse Engine]] by Andreas Paulick, [[CCC]], November 04, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=62169|Crazyhouse Computer Championships 2016]] by [[Ferdinand Mosca]], [[CCC]], November 17, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=62348|Human vs Engine Top Crazyhouse match !]] by [[Vincent Lejeune]], [[CCC]], December 01, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=62470|Crazyhouse, man vs machine, the return of the revenge !]] by [[Vincent Lejeune]], [[CCC]], December 13, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=62654|crazyhouse promotions]] by [[Erin Dame]], [[CCC]], December 30, 2016
* [[http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=53808|New crazyhouse engine]] by [[Harm Geert Muller]], [[Computer Chess Forums|Winboard Forum]], December 31, 2016 » [[CrazyWa]]
**2017**
* [[http://www.talkchess.com/forum/viewtopic.php?t=62698|Swiss Crazyhouse Tournament]] by Carlos Pagador, [[CCC]], January 02, 2017
* [[http://www.talkchess.com/forum/viewtopic.php?t=63525|Winboard variants online]] by [[Erin Dame]], [[CCC]], March 22, 2017 » [[Games#ChessVariants|Chess Variants]], [[WinBoard]]
* [[http://www.talkchess.com/forum/viewtopic.php?t=63571|crazyhouse tips?]] by [[Erin Dame]], [[CCC]], March 27, 2017
* [[http://www.talkchess.com/forum/viewtopic.php?t=65921|2nd Crazyhouse Computer Championships 2017]] by [[Ferdinand Mosca]], [[CCC]], December 07, 2017

=External Links= 
* [[https://en.wikipedia.org/wiki/Crazyhouse|Crazyhouse from Wikipedia]]
* [[http://www.chessvariants.com/other.dir/crazyhouse.html|Crazyhouse]] by [[Fergus Duniho]], [[https://en.wikipedia.org/wiki/The_Chess_Variant_Pages|The Chess Variant Pages]]
* [[https://sites.google.com/site/zhassociation/|Crazyhouse Chess Variant Association]] by [[Ferdinand Mosca]]
* [[http://ccva.challonge.com/1st_ccva_comp_champ_2016|1st CCVA Computer Championships 2016 - Challonge]]

=References= 
<references />
=What links here?= 
[[include page="Crazyhouse" component="backlinks" limit="100"]]
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