Event: A Division

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Opponent Rating Result
Steven B Booth 140 0 - 1
Jason Gentle 130 ½ - ½
Joe McGinnis 0 1 - 0
Ernest J Lazenby 149 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

5 = (419 + 400 * (1 - 2)) / 4)

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