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'''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://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
