Event: South London Qualifier

Opponent Rating Result
David Yuan 1491 0 - 1
Sivan Arunan 1357 ½ - ½
Aeri Lau 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

683 = (2848 + 400 * (0 - 2)) / 3)

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