Event: Open

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Opponent Rating Result
Phil Bull 157 1 - 0
Shahab U Quraishi 165 0 - 1
Phil Bull 157 0 - 1
Shahab U Quraishi 165 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-39 = (644 + 400 * (1 - 3)) / 4)

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