Event: St Andrews Club Championship

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Opponent Rating Result
Lester Jones 111 1 - 0
Giles Dunn 134 1 - 0
Andrew D Bettley 153 0 - 1
Ian Scott 113 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

228 = (511 + 400 * (2 - 1)) / 4)

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