Event: Doncaster League

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Opponent Rating Result
Farrell P Clifford 1760 ½ - ½
John E Beech 1638 1 - 0
Phillip J Battye 1676 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1958 = (5074 + 400 * (2 - 0)) / 3)

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