Event: Open County Championship

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Opponent Rating Result
Trevor J Ansell 1897 0 - 1
Neil Greenwood 1821 0 - 1
Stephen W Ruthen 1898 0 - 1
Jeff R Dawson 1919 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1484 = (7535 + 400 * (0 - 4)) / 4)

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