Event: Reigate

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Opponent Rating Result
Zachary Naylor-Vane 0 1 - 0
Oscar Tong 0 1 - 0
Matthew Chatfield 1408 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

869 = (1408 + 400 * (3 - 0)) / 3)

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