Editing Threefold repetition (section)

===Pillsbury vs. Burn, 1898===
{{Chess diagram 
|tright
|Pillsbury vs. Burn, 1898
|  |  |  |  |  |  |  |  
|  |  |  |  |  |pd|kd|  
|  |pd|  |  |  |  |pd|  
|pd|  |  |  |pd|  |  |pd
|pl|  |  |  |  |  |  |pl
|  |pl|  |  |qd|pl|pl|  
|  |  |ql|  |  |  |kl|  
|  |  |  |  |  |  |  |  
|Position after 42...Qe3, 46...Kg7 and 50...Kg7
}}
In this 1898 Vienna tournament game<ref>{{cite web|url=http://www.chessgames.com/perl/chessgame?gid=1035959 |title=Pillsbury vs. Burn, 1898 |publisher=Chessgames.com |access-date=2020-07-03}}</ref> between [[Harry Pillsbury]] and [[Amos Burn]], the same position occurred three times, but no draw could be claimed under the rules at the time. The tournament was played under the rules of [[Paul Rudolf von Bilguer|Bilguer's]] ''[[Handbuch des Schachspiels]]'' (1843, with later editions), in which the three-fold rule was stated as the repetition of moves or a sequence of moves, not a position. After 42...Qe3 ({{em|see diagram}}), the game continued:

:'''43. Qb2 Kh6'''
:'''44. Qc2 Kh7'''
:'''45. Qb2 Kg8'''
:'''46. Qc2 Kg7''' (second time)
:'''47. Qb2 Kh7'''
:'''48. Qc2 Kh6'''
:'''49. Qb2 Kh7'''
:'''50. Qc2 Kg7''' (third time)
:'''51. Qb2'''
Under modern rules, Black could claim a draw by informing the arbiter of their intention to play 50...Kg7, producing the same position as had occurred after 42...Qe3 and 46...Kg7. Alternatively, after 51.Qb2, Black could claim a draw immediately because White has repeated the position after 43.Qb2 and 47.Qb2. Burn went on to win the game.<ref>{{Harvcol|Giddins|2012|pp=166–67}}</ref>
{{clear}}