Event: South London Qualifier

Opponent Rating Result
Jan Birbee 904 1 - 0
Sebastian Walters 1177 ½ - ½
Roy Yuns 1374 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1285 = (3455 + 400 * (1 - 0)) / 3)

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