Event: Altrincham

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Opponent Rating Result
Lucas Potrykus 1158 ½ - ½
Mustafa Merchant 0 0 - 1
Sithun De Silva 1825 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

728 = (2983 + 400 * (0 - 2)) / 3)

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