Event: U1650R summer league

Opponent Rating Result
Mark D McWilliams 1351 1 - 0
Mark D McWilliams 1351 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1551 = (2702 + 400 * (1 - 0)) / 2)

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Opponent Rating Result
Davi Diniz Afonso 1638 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1238 = (1638 + 400 * (0 - 1)) / 1)