Difference between revisions of "Castling"
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* the king must not be in check | * the king must not be in check | ||
* no square between king's start and final square may be controlled by the enemy | * no square between king's start and final square may be controlled by the enemy | ||
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| + | =Irreversibility= | ||
| + | While castling is [[Irreversible Moves|irreversible]] with respect to the [[Castling Rights|castling rights]] and resets the position index to determine [[Repetitions#RepetitionOfPositions|repetition of positions]], castling doesn't reset, but increments the [[Halfmove Clock|halfmove clock]] concerning the [[Fifty-move Rule|fifty-move rule]] <ref>[http://www.open-chess.org/viewtopic.php?f=3&t=2209 Half Move Clock Confusion] by HumbleProgrammer, [[Computer Chess Forums|OpenChess Forum]], January 10, 2013</ref> <ref>[http://www.horst-wandersleben.de/Wette.htm Computerschach - Eine Wette, die ich gerne verloren habe] by [[Horst Wandersleben]]</ref>. | ||
=Chess960= | =Chess960= | ||
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* [https://en.wikipedia.org/wiki/Castling Castling from Wikipedia] | * [https://en.wikipedia.org/wiki/Castling Castling from Wikipedia] | ||
: [https://en.wikipedia.org/wiki/Artificial_castling Artificial castling from Wikipedia] | : [https://en.wikipedia.org/wiki/Artificial_castling Artificial castling from Wikipedia] | ||
| + | * [http://www.horst-wandersleben.de/Wette.htm Computerschach - Eine Wette, die ich gerne verloren habe] by [[Horst Wandersleben]] (German) » [[Fifty-move Rule]] <ref>[[Dieter Bürßner]] found a game finished in a [[Fifty-move Rule|fifty-move rule]] draw, where [[Castling|castling]] occurred during the last fifty moves</ref> | ||
=References= | =References= | ||
<references /> | <references /> | ||
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'''[[Moves|Up one Level]]''' | '''[[Moves|Up one Level]]''' | ||
Revision as of 11:57, 22 September 2018
Home * Chess * Moves * Castling
Castling is a composite move of King and Rook at the same time. In standard chess it consists of moving a king two squares towards the rook and executing a jump of a rook over the king.
Contents
Rules
The prequisites for doing it are as follows:
- the king and the relevant rook must not be moved, considered as castling rights inside a chess position
- the king must not be in check
- no square between king's start and final square may be controlled by the enemy
Irreversibility
While castling is irreversible with respect to the castling rights and resets the position index to determine repetition of positions, castling doesn't reset, but increments the halfmove clock concerning the fifty-move rule [2] [3].
Chess960
In Chess960 castling is a move reaching the position just like after standard chess castling, which may be achieved by (a) moving the king to c1 or g1 ant then executing a jump by relevant rook (b) jumping with the rook over a king already placed on c1 or g1 (c) interchanging the positions of king and rook [4].
Shogi
A formation achieved after castling is called a castle. This is often contrasted with a castle in the game of Shogi, requiring several moves to complete, but it seems wrong, since chess also has several standard defensive castle formations - like the one after fianchetto of a king's bishop or the one with a knight on g7, often achieved in the Old Benoni. For that reason it might be interesting to use shogi programming concepts of a castle map and an attack map in chess.
See also
- Algebraic Chess Notation - Castling
- Castling Rights
- King Safety
- Novag Micro Chess - Castling bug, CPWTIPC 1981
Forum Posts
1982
- Re: bug in chess program by Bruce C. Wright @ Duke University, net.chess, December 2, 1982
- Re: Origin of Castling by Bruce C. Wright @ Duke University, net.chess, December 4, 1982
2000 ...
- Castling legality check by mjlef, Winboard Forum, January 04, 2007
- Saving castling states and en passant history by Eric Lang, CCC, November 27, 2008 » En passant
- 0x88 FRC castle questions by Daniel Uranga, Winboard Forum, December 12, 2009 » Chess960
2010 ...
- Castling legality check by Stef Luijten, CCC, May 03, 2011
- Castling long by Lyudmil Tsvetkov, CCC, August 05, 2013
- Castling: A counter-intuitive result by Steven Edwards, CCC, September 03, 2013
- Abundance of castling vs en passant rights by Kirill Kryukov, CCC, April 14, 2014 » En passant
- Castling Evaluation by Dennis Sceviour, CCC, August 02, 2016 » King Safety
External Links
- Computerschach - Eine Wette, die ich gerne verloren habe by Horst Wandersleben (German) » Fifty-move Rule [5]
References
- ↑ Castling by Marina Kalinovsky, Artwork for Sale - Brooklyn, NY - United States
- ↑ Half Move Clock Confusion by HumbleProgrammer, OpenChess Forum, January 10, 2013
- ↑ Computerschach - Eine Wette, die ich gerne verloren habe by Horst Wandersleben
- ↑ 0x88 FRC castle questions by Daniel Uranga, Winboard Forum, December 12, 2009
- ↑ Dieter Bürßner found a game finished in a fifty-move rule draw, where castling occurred during the last fifty moves
