Event: County Championship

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Opponent Rating Result
George West 0 1 - 0
Richard Stokes 0 1 - 0
Ian McDonald 0 ½ - ½
Nicholas Lees 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

200 = (0 + 400 * (2 - 0)) / 4)

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