Event: Division 1

Opponent Rating Result
Simon N Gilmore 180 ½ - ½
Jon EW Blackburn 141 1 - 0
Martyn J Harris 155 0 - 1
Kenneth J McNulty 135 1 - 0
Alan M Paling 149 ½ - ½
Pavel Nefyodov 162 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

220 = (922 + 400 * (2 - 1)) / 6)

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