Event: Bak

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Opponent Rating Result
Anthony J Lightowler 85 1 - 0
Will Lilburn-Quick 58 0 - 1
Chris McConaghy 0 0 - 1
Anthony J Lightowler 78 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-45 = (221 + 400 * (1 - 2)) / 4)

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