Event: Division 2

Opponent Rating Result
Petr Vachtfeidl 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-400 = (0 + 400 * (0 - 1)) / 1)

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Opponent Rating Result
Peter Hazell 0 ½ - ½
Paul Kennelly 0 1 - 0
David Steyn 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

267 = (0 + 400 * (2 - 0)) / 3)