Event: C Division

Opponent Rating Result
Bill March 1491 ½ - ½
Andrew Salter 1227 1 - 0
Ajay Selvan 1450 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1523 = (4168 + 400 * (1 - 0)) / 3)

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