Event: Christmas Rapid

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Opponent Rating Result
Judith Heffer 1876 0 - 1
Daniel Pugh 1589 1 - 0
Robert L Jones 1720 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1595 = (5185 + 400 * (1 - 2)) / 3)

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