Event: Three East

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Opponent Rating Result
Shakeel Choudhury 1660 0 - 1
Mark J Huba 1510 1 - 0
Nicholas Groves-Kirkby 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

923 = (3170 + 400 * (1 - 2)) / 3)

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