Event: HDCA Summer League Division 1

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Opponent Rating Result
Graham Chesters 167 ½ - ½
Steve R Hodge 177 ½ - ½
Andrew D Bettley 156 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

167 = (500 + 400 * (0 - 0)) / 3)

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