Event: 4-board Division 3

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Opponent Rating Result
William I Wright 1610 ½ - ½
Matthew Bell 1400 0 - 1
Robert Docwra 1651 0 - 1
Jonathan R Slater 1300 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1190 = (5961 + 400 * (0 - 3)) / 4)

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