Event: Peter Harrison Knockout Cup

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Opponent Rating Result
Tim P Gudgeon-Osterritter 119 0 - 1
Steve J Dyer 129 0 - 1
Robert Ashworth 156 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-265 = (404 + 400 * (0 - 3)) / 3)

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