Event: Roger Goldsmith Div 1

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Opponent Rating Result
James A Briginshaw 1783 ½ - ½
Anthony Chan 1772 0 - 1
Peter Newton 1728 ½ - ½
Sergejs Starodubcevs 1621 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1526 = (6904 + 400 * (0 - 2)) / 4)

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