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Event: Rating Challenge

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Opponent Rating Result
Shaun J Culkin 2032 0 - 1
Joseph Catto 1856 1 - 0
Joe Varley 2125 0 - 1
Joe Varley 2125 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1835 = (8138 + 400 * (1 - 3)) / 4)

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