Event: Altrincham

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Opponent Rating Result
Vinay Saravanan 931 1 - 0
Dara Robinson 0 0 - 1
Valentine Fikhter 1212 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

581 = (2143 + 400 * (1 - 2)) / 3)

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