Event: A Division

Opponent Rating Result
Mitchell R Burke 2112 0 - 1
David Burgess 2050 1 - 0
Michael P Crowther 1838 ½ - ½
Chun Hei Wong 1860 0 - 1
Adam Tyton 1872 ½ - ½
Jeff Mason 1748 1 - 0
Christopher Hodgson 1736 ½ - ½
Robert McLean 2021 0 - 1
Kelechukwu Nkwonta 1850 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1810 = (17087 + 400 * (2 - 4)) / 9)

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