Event: Durham League Division B

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Opponent Rating Result
Robert Donner 1642 1 - 0
Vaughan Davison 1622 1 - 0
Zachary Barton 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1221 = (3264 + 400 * (2 - 1)) / 3)

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Opponent Rating Result
Robert Berry 1579 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1579 = (1579 + 400 * (0 - 0)) / 1)