Event: St Andrews Club Championship

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Opponent Rating Result
Steve Donoghue 80 ½ - ½
Ian Scott 113 1 - 0
Bryan Wilson 110 ½ - ½
David G Mills 136 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

310 = (439 + 400 * (2 - 0)) / 4)

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