Event: C Division

Opponent Rating Result
Graham E Edwards 1353 1 - 0
Mark Turner 1437 0 - 1
Oliver Williams 1350 1 - 0
James Mann 1341 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1470 = (5481 + 400 * (2 - 1)) / 4)

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