Event: Division 1

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Opponent Rating Result
Julia Volovich 162 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

562 = (162 + 400 * (1 - 0)) / 1)

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Opponent Rating Result
Ian J Wallis 171 0 - 1
Sarah R Weersing 144 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-43 = (315 + 400 * (0 - 1)) / 2)