Event: Lytham Club Championship

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Opponent Rating Result
David E Aspinall 139 0 - 1
Graham Taylor 118 1 - 0
Robert Tinton 125 0 - 1
John Cox 85 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

17 = (467 + 400 * (1 - 2)) / 4)

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