Event: County Championship

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Opponent Rating Result
Jimmy Blair 0 1 - 0
Alan J Nelder 1597 0 - 1
Jason Gillatt 0 1 - 0
Richard Stokes 0 0 - 1
Andrew T Watson 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

319 = (1597 + 400 * (2 - 2)) / 5)

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