Event: City Chess Swiss 2017-18

Opponent Rating Result
Daniel Tunkel 0 1 - 0
Samuel Burrows 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

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

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

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