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Event: WMA Spring League Division 2

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Opponent Rating Result
Colin G Vernon 0 ½ - ½
George Mitchell 70 ½ - ½
Colin G Vernon 0 1 - 0
George Mitchell 70 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

35 = (140 + 400 * (1 - 1)) / 4)

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