Event: Division 5

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Opponent Rating Result
Philip Wright 75 0 - 1
Kobus Nienaber 93 0 - 1
David Hackney 68 1 - 0
Isabelle M Rose 70 1 - 0
Simon Haas 50 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-9 = (356 + 400 * (2 - 3)) / 5)

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