Event: Bak

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Opponent Rating Result
Simon Jones 72 0 - 1
Anthony J Lightowler 78 0 - 1
Nicholas Waite 76 0 - 1
Chris McConaghy 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-144 = (226 + 400 * (1 - 3)) / 4)

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