Event: South London Qualifier

Opponent Rating Result
Jack Chaudhury 1534 0 - 1
Jan Cichon 0 1 - 0
Joshua Doyle 1610 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

915 = (3144 + 400 * (1 - 2)) / 3)

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