Event: Dave Nicholas Summer League

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Opponent Rating Result
Andrew Gibson 133 ½ - ½
Joshua Gittins 121 1 - 0
Joshua Gittins 121 ½ - ½
Andrew Gibson 133 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

127 = (508 + 400 * (1 - 1)) / 4)

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