Event: Division 2

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Opponent Rating Result
Jon AN Lawrance 155 0 - 1
Chris Lake 157 1 - 0
Henry Adams 136 1 - 0
Jim Graham 149 0 - 1
Adam R Ursell 142 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

68 = (739 + 400 * (2 - 3)) / 5)

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