Event: County Championship

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Opponent Rating Result
Robert K Taylor 0 1 - 0
Joe Kilshaw 0 1 - 0
Craig M Whitfield 0 1 - 0
Martin Pettinger 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

300 = (0 + 400 * (3 - 0)) / 4)

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