Event: Barclays Chess Club Rapid Tournament No. 2/2019

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Opponent	Rating	Result
Yaroslav Lyulko	0	0 - 1
Paul Walton	0	0 - 1
Rohan Krishniah	0	0 - 0
Konstantinos Sakellariou	0	0 - 1
Sam Thakkar	0	0 - 0
Daniel Lindner	0	0 - 0
Victor Heinrich	0	0 - 1

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

-400 = (0 + 400 * (0 - 4)) / 4)