Event: Division 1

Opponent Rating Result
David J Faulkner 1853 ½ - ½
Istvan Karacsony 1820 0 - 1
David Ruppert 1546 1 - 0
Peter Biggs 1686 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1626 = (6905 + 400 * (1 - 2)) / 4)

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