Event: Roger Goldsmith Div 1

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Opponent Rating Result
Stephen W Ruthen 1850 0 - 1
Stephen C Pride 1655 0 - 1
Stephen C Pride 1597 0 - 1
Andrew J Donnelly 1818 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1430 = (6920 + 400 * (0 - 3)) / 4)

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