Event: Altrincham

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Opponent Rating Result
Wiktor Lech 0 ½ - ½
George Seaman 0 1 - 0
Mukil Balamurugan 1258 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

686 = (1258 + 400 * (2 - 0)) / 3)

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