Event: Christmas Rapid

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Opponent Rating Result
Robert L Jones 1720 1 - 0
Judith Heffer 1876 0 - 1
Sergejs Starodubcevs 1465 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1554 = (5061 + 400 * (1 - 2)) / 3)

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