Event: Eton Rapidplay 2019

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Opponent	Rating	Result
Ugas Jeyakanth	91	1 - 0
Matthew Gray	142	0 - 1
Alexander He Wang	90	0 - 1

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

-26 = (323 + 400 * (1 - 2)) / 3)