Event: Dave Nicholas Summer League

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Opponent Rating Result
Richard Sida 107 ½ - ½
Simon Gathern 0 0 - 1
Richard Sida 107 0 - 1
Simon Gathern 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-247 = (214 + 400 * (0 - 3)) / 4)

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