Event: Durham League Division A

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Opponent Rating Result
George Gazis 2031 1 - 0
Abigail R Weersing 2119 0 - 1
John Boyd 2051 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2200 = (6201 + 400 * (2 - 1)) / 3)

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