Event: Roger Goldsmith Div 1

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Opponent Rating Result
Ruben Evans 1792 0 - 1
Mark Webb 1400 0 - 1
Yoav Pilowsky Bankirer 1772 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1521 = (4964 + 400 * (1 - 2)) / 3)

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