Event: Division A

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Opponent Rating Result
Barry J Hymer 176 1 - 0
Paul A Evans 181 1 - 0
Malcolm R Peacock 184 0 - 1
Graham J Ashcroft 163 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

176 = (704 + 400 * (2 - 2)) / 4)

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