Event: Lytham Club Championship

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Opponent Rating Result
Philip N Raynor 145 ½ - ½
Paul A Evans 184 ½ - ½
John Regan 104 1 - 0
Rob Gallagher 158 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

348 = (591 + 400 * (2 - 0)) / 4)

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