Event: A Division

Opponent Rating Result
Philip Armstrong 1975 0 - 1
Chun Hei Wong 1860 0 - 1
Andrew Beswick 1614 1 - 0
Paul Doherty 1759 1 - 0
Jeff Mason 1748 1 - 0
Adam Scoular 1905 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1810 = (10861 + 400 * (3 - 3)) / 6)

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