Event: Cobham

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Opponent Rating Result
Adam Tarling 1630 0 - 1
Shahmeer Khathak 0 0 - 1
Joe Inch 1489 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

640 = (3119 + 400 * (0 - 3)) / 3)

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