Event: City Chess Swiss 2019-20

Opponent Rating Result
David R Sedgwick 1788 1 - 0
Graham P Alcock 0 1 - 0
David Hassine 0 1 - 0
Harshvardhan Varadarajan 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

647 = (1788 + 400 * (3 - 1)) / 4)

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