Event: Grand Prix

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Opponent Rating Result
Charlie Back 0 ½ - ½
Theodoros Kokkoris 0 1 - 0
Gregory Konyakhin Borrelly 1631 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

810 = (1631 + 400 * (2 - 0)) / 3)

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