Event: Division 2

Opponent Rating Result
Jon M Griffiths 1792 0 - 1
Paul ER Badger 1863 ½ - ½
Anthony Sadler 1813 ½ - ½
David R Thomas 1781 ½ - ½
Dmytro S Chernov 1725 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1635 = (8974 + 400 * (0 - 2)) / 5)

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