Event: Division 1

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Opponent Rating Result
Mark Broom 200 ½ - ½
Jeffrey Boardman 175 ½ - ½
Richard R Welford 167 0 - 1
Daniel Lowe 193 1 - 0
Geoffrey H James 182 ½ - ½
Peter Larwood 164 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

180 = (1081 + 400 * (1 - 1)) / 6)

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Opponent Rating Result
Alec Hedger 148 1 - 0
Duncan R Badham 150 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

349 = (298 + 400 * (1 - 0)) / 2)