Event: Division 5

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Opponent Rating Result
Richard Hind 29 1 - 0
Ben Harrison 65 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

47 = (94 + 400 * (1 - 1)) / 2)

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Opponent Rating Result
Roger Coleman 70 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-330 = (70 + 400 * (0 - 1)) / 1)