Event: South London Qualifier

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Opponent Rating Result
Hongyu An 91 0 - 1
Jan Cichon 0 1 - 0
Ameya Bhattacharya 0 1 - 0
Leah Farrant 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

223 = (91 + 400 * (3 - 1)) / 4)

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