Event: Division 3

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Opponent Rating Result
Douglas W Stevenson 104 1 - 0
Ian Dennis 137 ½ - ½
John TA Moore 118 1 - 0
Roger Waddingham 105 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

416 = (464 + 400 * (3 - 0)) / 4)

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