Event: Summer Tournament 2019

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Opponent	Rating	Result
Jim I Wrigglesworth	102	0 - 1
Brendan Barry	102	0 - 1
Mark Connor	1456	0 - 1
Laith Hayali	141	1 - 0
John T Harvey	112	0 - 1
Ashok Shah	50	0 - 1
Greg J Breed	146	0 - 1
Robert Parsons	133	0 - 1

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

-20 = (2242 + 400 * (1 - 7)) / 8)