Event: Eton Rapidplay 2019

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Opponent	Rating	Result
Rohit M Jose	73	1 - 0
Rhea Saxena	50	0 - 1
Joshua Owen	27	0 - 1

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

-83 = (150 + 400 * (1 - 2)) / 3)