Event: Division 1

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Opponent Rating Result
Joe Everett 181 1 - 0
Vivian J Cole 174 1 - 0
Richard R Welford 167 ½ - ½
Mark Broom 193 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

479 = (715 + 400 * (3 - 0)) / 4)

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