Event: Division 2

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Opponent	Rating	Result
Edward Booth	1618	0 - 1
Robert W Counsell	1747	1 - 0
Leo Woning	1776	½ - ½

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1714 = (5141 + 400 * (1 - 1)) / 3)