Event: HDCA Summer League Division 1

Opponent Rating Result
Andrew D Bettley 156 ½ - ½
Douglas Vleeshhouwer 166 0 - 1
Graham Chesters 148 ½ - ½
Richard O Callis 145 1 - 0
Zak Farley 162 1 - 0
Mark I Collinson 162 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

223 = (939 + 400 * (2 - 1)) / 6)

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