Event: Roger Goldsmith Div 2

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Opponent Rating Result
Mark Heffer 1679 0 - 1
Robert L Jones 1699 0 - 1
Michael MJ Osborn 1562 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1513 = (4940 + 400 * (1 - 2)) / 3)

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