Event: Grand Prix

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Opponent Rating Result
David Blackwell 0 0 - 1
Marco Flaccavento 0 1 - 0
Zoya Boozorginia 1276 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

559 = (1276 + 400 * (2 - 1)) / 3)

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