Editing Threefold repetition (section)

===Fischer vs. Spassky, 1972===
{{Chess diagram
 |tright
 |Fischer vs. Spassky, 1972
 |  |  |  |  |  |  |  |  
 |  |  |  |  |  |  |  |  
 |  |  |  |kd|  |  |bd|  
 |  |pd|  |  |pd|  |  |pd
 |pd|  |  |nd|  |  |pd|  
 |pl|  |kl|  |nl|  |pl|  
 |  |pl|pl|  |  |  |  |pl
 |  |  |  |  |nl|  |  |  
 |Position after 48.Kc3, 50.Ne1 and 54...Nd4 (different turn)
}}
In the [[World Chess Championship 1972#Game 20|twentieth game]]<ref>{{cite web|url=http://www.chessgames.com/perl/chessgame?gid=1044372 |title=Fischer vs. Spassky, 20th game, 1972 |publisher=Chessgames.com |access-date=2020-07-03}}</ref> of the [[World Chess Championship 1972|1972 World Chess Championship]] between [[Bobby Fischer]] and [[Boris Spassky]], Fischer called the {{chessgloss|arbiter}} [[Lothar Schmid]] to claim a draw because of threefold repetition.  Spassky did not dispute it and signed the scoresheets before the arbiter ruled.<ref>{{Harvcol|Gligorić|1972|p=119}}</ref> After the draw had been agreed, it was pointed out that the position had occurred after White's 48th ({{em|see diagram}}) and 50th moves, and again after Black's 54th move.  So the claim was actually invalid because it was not the same player's turn to move in all three instances, but the draw result stood.<ref>{{Harvcol|Alexander|1972|pp=137–38}}</ref><ref>Alexander says that it appears that the arbiter approved the draw but Gligorić says that Spassky signed the scoresheet before the arbiter could rule on the claim.</ref>
{{clear}}