Event: Division 2

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Opponent Rating Result
Richard Chillcott 139 1 - 0
Stefan Walentowicz 174 0 - 1
Keith Aiton 157 0 - 1
Francis J Bowers 166 0 - 1
David Flynn 161 ½ - ½
Shane Bhayat 145 0 - 1
Alan J Nelder 126 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

38 = (1068 + 400 * (2 - 4)) / 7)

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