Event: County Championship

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Opponent Rating Result
Alan J Nelder 1597 0 - 1
Jason Golding 0 0 - 1
Stephen A Hutchinson 0 1 - 0
Andrew T Watson 0 0 - 1
Jason Gillatt 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

79 = (1597 + 400 * (1 - 4)) / 5)

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