Event: Division One

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Opponent Rating Result
Colin S Procter 156 1 - 0
Dave Patrick 162 ½ - ½
Derek Ludlam 110 1 - 0
Paul RH Clarke 143 ½ - ½
Clive W Davies 159 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

226 = (730 + 400 * (2 - 1)) / 5)

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