Event: Bolton Qualifier

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Opponent Rating Result
Hercules So 0 ½ - ½
Cillian Kilheeney 1031 1 - 0
Jian Guan 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

610 = (1031 + 400 * (2 - 0)) / 3)

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