Event: Peter Hughes

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Opponent Rating Result
Oleg Dukalev 142 ½ - ½
Tim M Turner 161 1 - 0
Stephen Crow 154 1 - 0
Graham Chesters 167 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

356 = (624 + 400 * (2 - 0)) / 4)

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