Event: City Chess Swiss 2019-20

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Opponent Rating Result
Konstantinos Sakellariou 1503 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1503 = (1503 + 400 * (0 - 0)) / 1)

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Opponent Rating Result
Anthony GC Paish 0 0 - 1
Rajesh Toleti 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

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