Event: Doncaster League

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Opponent Rating Result
Ismet Berisha 143 0 - 1
John P Mainwaring 140 0 - 1
Ismet Berisha 143 0 - 1
George D Boothman 128 1 - 0
Phillip J Battye 131 0 - 1
Anthony Perry 112 1 - 0
Anthony Perry 112 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

73 = (909 + 400 * (3 - 4)) / 7)

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