Event: Division 2

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Opponent Rating Result
Railton W Hyde 143 0 - 1
Philip N Birks 142 0 - 1
Simon Layhe 134 1 - 0
Jon EW Blackburn 144 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

41 = (563 + 400 * (1 - 2)) / 4)

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