Event: Division 2

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Opponent Rating Result
James Alvarez 147 0 - 1
Chris W Heath 158 1 - 0
Andrew J Briggs 171 1 - 0
Roger Fenn 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

219 = (476 + 400 * (2 - 1)) / 4)

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