Event: Division A

Opponent Rating Result
Malcolm R Peacock 185 ½ - ½
Richard A Collins 172 ½ - ½
Philip N Raynor 145 1 - 0
Michael L Parker 160 1 - 0
Graham J Ashcroft 161 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

325 = (823 + 400 * (2 - 0)) / 5)

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