Event: Mamhead

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Opponent Rating Result
Brian GE Gosling 156 ½ - ½
Clifford B Peach 104 1 - 0
Nick J Butland 156 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

139 = (416 + 400 * (1 - 1)) / 3)

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