Event: Roger Goldsmith Div 2

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Opponent Rating Result
Robert L Jones 146 1 - 0
Yoav Pilowsky Bankirer 141 ½ - ½
William Gu 110 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

399 = (397 + 400 * (2 - 0)) / 3)

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