Event: Division One

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Opponent Rating Result
Simon A Williams 166 1 - 0
Jana M Bellin 176 ½ - ½
Kevin Hurney 186 0 - 1
Keith R Ingram 167 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

174 = (695 + 400 * (1 - 1)) / 4)

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