Event: Durham League Division A

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Opponent Rating Result
Steve H Jefferies 1604 1 - 0
Jonathan Sams 1814 1 - 0
William Bartram 1924 0 - 1
Christopher Sayers 1605 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1937 = (6947 + 400 * (3 - 1)) / 4)

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