Event: Beverley Club Championship

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Opponent Rating Result
David J Gibson 113 1 - 0
Douglas Vleeshhouwer 172 0 - 1
Graham Lee 117 ½ - ½
Edward S Oxley 142 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

236 = (544 + 400 * (2 - 1)) / 4)

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