Event: City Chess Swiss 2019-20

Opponent Rating Result
Nikolay Naumovich 1960 ½ - ½
Richard Fidler 0 ½ - ½
Inga Jirgensone 0 0 - 1
Vytautas Mikalajunas 0 0 - 1
Alan Freedman 0 1 - 0
David R Sedgwick 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

260 = (1960 + 400 * (1 - 2)) / 6)

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