Event: Hamilton Cup

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Opponent Rating Result
Andrew Swales 121 0 - 1
Goodchild Ndou 93 1 - 0
Peter Dickinson 116 ½ - ½
Peter Dickinson 116 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

12 = (446 + 400 * (1 - 2)) / 4)

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