Event: County Championship

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Opponent Rating Result
David Flynn 1928 0 - 1
Dragoljub Sudar 1906 1 - 0
Shabir Okhai 2248 0 - 1
Paul Wileman 1677 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1840 = (7759 + 400 * (1 - 2)) / 4)

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