Event: St Andrews Club Championship

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Opponent Rating Result
Michael A Pollard 129 0 - 1
Lester Jones 111 ½ - ½
Steve King 109 1 - 0
Steve Donoghue 80 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

207 = (429 + 400 * (2 - 1)) / 4)

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