Event: Club Championship

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Opponent Rating Result
Ray Bettam 1551 0 - 1
Nigel Terry 1232 0 - 1
Des J Green 1117 ½ - ½
Malcolm Jones 1263 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

991 = (5163 + 400 * (0 - 3)) / 4)

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