Event: Roger Goldsmith Div 1

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Opponent Rating Result
Oded Pilowsky Bankirer 1851 0 - 1
Andrew Shephard 1861 0 - 1
Robert L Jones 1714 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1675 = (5426 + 400 * (1 - 2)) / 3)

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