Event: Division 5

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Opponent Rating Result
John Pocock 100 0 - 1
Daniel Hardman 105 0 - 1
Gavin Dow 90 1 - 0
Peter Clarke 108 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-99 = (403 + 400 * (1 - 3)) / 4)

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Opponent Rating Result
Imran Chaudhry 86 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

486 = (86 + 400 * (1 - 0)) / 1)