585
edits
Changes
→2020 ...
'''[[Main Page|Home]] * [[Search]] * Repetitions'''
[[FILE:EschersReptiles.jpg|border|right|thumb|link=http://www.mcescher.com/Gallery/back-bmp/LW327.jpg|[[Arts#:Category:M. C. Escher|M. C. Escher]], Reptiles, 1943 <ref>[http://www.mcescher.com/Gallery/back-bmp/LW327.jpg Picture gallery "Back in Holland 1941 - 1954"] from [http://www.mcescher.com/ The Official M.C. Escher Website]</ref> ]]
'''Repetitions''' of [[Chess Position|positions]] may happen during [[Chess Game|game play]] and inside the [[Search|search]] of a chess program due to [[Reversible Moves|reversible moves]] played from both sides, which might be nullified in one or multiple further reversible moves. The player to move '''may''' claim a [[Draw|draw]] if the same position occurs '''three''' times, or will occur after an intended move, in any order, with the same player to move.
Two positions are considered same or equal, if all occupied squares and kind of [[Pieces|pieces]] (not necessarily the same piece) they occupy are the same, the [[Castling rightsRights|castling rights]] for both sides did not change, and no [[En passant|en passant capture]] was possible during the first occurrence, even if obviously not played.
=Assigning Draw Score=
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/e3bf1dac24b7b1ce Perpetual check] by [[Ian Kennedy]], [[Computer Chess Forums|rgcc]], May 19, 1997
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/1d601e208c97c395 Handling of repetition (draw) in transposition table] by Bjarke Dahl Ebert, [[Computer Chess Forums|rgcc]], June 9, 1997
* [https://groups.google.com/d/msg/rec.games.chess.computer/T9VBgvjL450/u6aUpiL1XzMJ Detected draw by repetition] by [[Tim Foden]], [[Computer Chess Forums|rgcc]], October 15, 1997
* [http://groups.google.com/group/rec.games.chess.computer/browse_frm/thread/c431ac1739de871b triple repetition] by Daniel Kang, [[Computer Chess Forums|rgcc]], October 26, 1997
* [https://www.stmintz.com/ccc/index.php?id=22816 draw by repetition and hash tables] by [[Werner Inmann]], [[CCC]], July 24, 1998
* [https://www.stmintz.com/ccc/index.php?id=47663 Draw by 2nd repetition?] by [[James Robertson]], [[CCC]], March 31, 1999
* [https://www.stmintz.com/ccc/index.php?id=72221 Problem with draws by rep and hash table] by [[James Robertson]], [[CCC]], October 07, 1999
==2000 ...==
* [https://www.stmintz.com/ccc/index.php?id=99216 Does your program understand castling/en passant rights on 3x repetition] by Richard A. Fowell, [[CCC]], February 27, 2000 » [[Castling Rights]], [[En passant]]
* [https://www.stmintz.com/ccc/index.php?id=119867 Detecting three-fold repetition?] by [[Tom Kerrigan]], [[CCC]], July 17, 2000
: [https://www.stmintz.com/ccc/index.php?id=119911 Re: Detecting three-fold repetition?] by [[John Stanback]], [[CCC]], July 17, 2000 » [[SCP#Repetitions|SCP Repetition detection]]
* [http://www.talkchess.com/forum/viewtopic.php?t=22968 Repetition Detection] by Colin, [[CCC]], August 13, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=23257 When and how to return a draw evaluation?] by [[Mathieu Pagé]], [[CCC]], August 26, 2008 » [[Draw]]
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=25075 Are everybody making this bad?] by [[Fermin Serrano]], [[CCC]], November 26, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=25705 Draw by repetition when mate is possible] by [[Mathieu Pagé]], [[CCC]], December 30, 2008 » [[Checkmate]]
'''2009'''
* [http://www.talkchess.com/forum/viewtopic.php?t=36599 bizarre repetition detection issue] by [[Robert Hyatt]], [[CCC]], November 04, 2010
'''2011'''
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=38608 Repeating moves to add time] by [[Fermin Serrano]], [[CCC]], March 31, 2011 » [[Time Management]]
* [http://www.talkchess.com/forum/viewtopic.php?t=40388 Repetitions/50 moves and TT] by [[Sergei Markoff]], [[CCC]], September 13, 2011
* [http://www.talkchess.com/forum/viewtopic.php?t=40931 repetition detection] by [[Edmund Moshammer]], [[CCC]], October 29, 2011
* [http://www.open-chess.org/viewtopic.php?f=5&t=2093 Aquarium IDEA, repetitions, and minimax over cycles] by kevinfat, [[Computer Chess Forums|OpenChess Forum]], September 17, 2012 » [[Aquarium]]
* [http://www.talkchess.com/forum/viewtopic.php?t=45774 Why is this game not a draw?] by [[Carlos Pagador]], [[CCC]], October 29, 2012
* [http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=490672&t=45846 Re: Move Tables - explain as if I'm five] by [[Karlo Balla|Karlo Bala Jr.]], [[CCC]], November 05, 2012 » [[Belzebub#Repetitions|Repetitions in Belzebub]]
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=4&t=52677&sid=5875e0b83aa323c58f9e9b3af0718049 FIDE Rules] by crystalclear, [[Computer Chess Forums|Winboard Forum]], December 11, 2012
'''2013'''
* [http://www.talkchess.com/forum/viewtopic.php?t=48696 Repetition check] by [[Harm Geert Muller]], [[CCC]], July 20, 2013
* [http://www.talkchess.com/forum/viewtopic.php?t=48768 UCI protocol issue] by [[Jon Dart]], [[CCC]], July 27, 2013 » [[UCI]]
* [http://www.talkchess.com/forum/viewtopic.php?t=49362 ep and castle rights hashing] by [[Natale Galioto]], [[CCC]], September 15, 2013 » [[Castling rightsRights]], [[En passant]], [[Transposition Table]]
'''2014'''
* [http://www.talkchess.com/forum/viewtopic.php?t=51000 Two fold repetition rule] by [[Michel Van den Bergh]], [[CCC]], January 22, 2014
* [http://www.talkchess.com/forum/viewtopic.php?t=59841 How to test 3rd repetition rule?] by [[Luis Babboni]], [[CCC]], April 12, 2016
: [http://www.talkchess.com/forum/viewtopic.php?t=59841&start=14 This should be in the wiki] by [[Steven Edwards]], [[CCC]], April 13, 2016
* [http://www.talkchess.com/forum/viewtopic.php?t=59854 3rd repetition, a case where not cause castle rights... but] by [[Luis Babboni]], [[CCC]], April 14, 2016 » [[Castling rightsRights]]
* [http://www.talkchess.com/forum/viewtopic.php?t=60075 Triple Repitition: Is this considered a repitition or not?] by Jayakiran Akurathi, [[CCC]], May 07, 2016 » [[En passant]]
* [http://www.talkchess.com/forum/viewtopic.php?t=60310 Repetitions in the Search Tree] by Jayakiran Akurathi, [[CCC]], May 29, 2016
'''2018'''
* [http://www.talkchess.com/forum/viewtopic.php?t=66323 3-fold repetition and cutechess-cli] by Lars Mathiesen, [[CCC]], January 14, 2018 » [[En passant]]
==2020 ...==
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=73552 FEN and 3rd repetition rule. No information?] by [[Luis Babboni]], [[CCC]], April 03, 2020 » [[Forsyth-Edwards Notation|FEN]]
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=75573 Make engine stop repeating moves in a clearly won position] by [[Marcel Vanthoor]], [[CCC]], October 27, 2020
'''2021'''
* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=77497 Alpha-beta search for drawing endgames] by Emanuel Torres, [[CCC]], June 16, 2021 » [[Alpha-Beta]], [[Draw Evaluation]], [[Graph History Interaction]]
'''2022'''
* [https://www.talkchess.com/forum3/viewtopic.php?f=7&t=79286 Draw by repetition] by Philippe Chevalier, [[CCC]], February 05, 2022
* [https://www.talkchess.com/forum3/viewtopic.php?f=7&t=80520 Elegant algorithm for detecting repetitions?] by A. Li, [[CCC]], August 19, 2022
=External Links=
* [https://en.wikipedia.org/wiki/Perpetual_check Perpetual check from Wikipedia]
* [http://www.fide.com/component/handbook/?id=124&view=article Fide Handbook - E.I.01A. Laws of Chess]
* [https://rjlipton.wordpress.com/2016/01/21/a-chess-firewall-at-zero/ A Chess Firewall at Zero?] by [[Kenneth Wingate W. Regan|Ken Regan]], [https://rjlipton.wordpress.com/ Gödel's Lost Letter and P=NP], January 21, 2016* [[Videos#AgnesObel:Category:Agnes Obel|Agnes Obel]] - [http://lyrics.wikia.com/wiki/Agnes_Obel:It%27s_Happening_Again It's Happening Again] (2016), [https://en.wikipedia.org/wiki/BBC_Radio_6_Music BBC 6 Music Live Room], [https://en.wikipedia.org/wiki/YouTube YouTube] Video
: featuring [https://www.couchsurfing.com/people/kriskar Kristina Koropecki], [https://mobile.twitter.com/agnesobel_org/status/637306150413803524 Charlotte Danhier], [https://www.discogs.com/de/artist/1453695-Catherine-De-Biasio Catherine De Biasio]
: {{#evu:https://www.youtube.com/watch?v=1zED62IYPe4|alignment=left|valignment=top}}
'''[[Search|Up one Level]]'''
[[Category:M. C. Escher]]
[[Category:Agnes Obel]]
