Event: League

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Opponent Rating Result
Bernard Pratten 144 ½ - ½
Bernard Pratten 144 ½ - ½
Mike Dew 113 1 - 0
Stan J Smart 128 ½ - ½
Joanne Hutchinson 141 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

214 = (670 + 400 * (1 - 0)) / 5)

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