Event: Division 2

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Opponent Rating Result
Robert W Counsell 123 1 - 0
Robin A Jones 163 0 - 1
Jon AN Lawrance 158 1 - 0
Michael Stockham 137 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

345 = (581 + 400 * (3 - 1)) / 4)

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