Event: NCCA League Division 3

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Opponent Rating Result
John Stevens 1573 1 - 0
Jon Vallet 1500 1 - 0
David C May 1567 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1680 = (4640 + 400 * (2 - 1)) / 3)

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