Event: Doncaster League

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Opponent Rating Result
Pete Micklethwaite 162 0 - 1
Ismet Berisha 139 1 - 0
Neil R Lowther 161 ½ - ½
Steven Devonshire 118 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

245 = (580 + 400 * (2 - 1)) / 4)

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