Event: Division 2

Opponent Rating Result
Piotr Klukowski 1949 0 - 1
Tadeusz Tompsett 1716 0 - 1
Sam Smith 1464 1 - 0
Ian K Edgson 1717 1 - 0
Paul R Selby 1761 0 - 1
Ian Dennis 1704 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1585 = (10311 + 400 * (2 - 4)) / 6)

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