Event: Lytham Club Championship

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Opponent Rating Result
Rob Gallagher 158 0 - 1
Colin Wilks 113 ½ - ½
Dennis Davies 103 0 - 1
Graham Taylor 110 1 - 0
John Cox 82 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

113 = (566 + 400 * (2 - 2)) / 5)

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