Event: Club Championship

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Opponent Rating Result
Philip May 98 1 - 0
John Grasham 134 ½ - ½
Ian Carrigan 122 1 - 0
Frank T Sheldrick 142 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

424 = (496 + 400 * (3 - 0)) / 4)

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