Event: Division One

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Opponent Rating Result
Parminder Sanghera 208 ½ - ½
Keith C Arkell 240 0 - 1
Peter J Batchelor 224 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

91 = (672 + 400 * (0 - 1)) / 3)

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