Event: South London Qualifier

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Opponent Rating Result
Hafsa Ayoob Ali 0 0 - 1
Maks Ostashchuk 0 0 - 1
Rafi Ryde 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

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

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