Event: Uxbridge Rapid

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Opponent Rating Result
Oscar Tse-Fong-Tai 567 0 - 1
Oscar Tse-Fong-Tai 567 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

567 = (1134 + 400 * (1 - 1)) / 2)

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