Event: League Division One

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Opponent Rating Result
AJ (Tony) Slinger 170 ½ - ½
John Grasham 129 0 - 1
Dale H Cullum 149 0 - 1
Kenneth L Marsden 92 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

35 = (540 + 400 * (1 - 2)) / 4)

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