Event: County Challenge

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Opponent Rating Result
Tom A Barton 0 0 - 1
Trevor A Dickerson 1683 1 - 0
D Ian W Reynolds 1915 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1199 = (3598 + 400 * (1 - 1)) / 3)

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