Event: Championship 2019

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Opponent	Rating	Result
Neil Griffiths	131	0 - 1
Andy J Bagley	165	0 - 1
Tom Devlin	105	0 - 1
Rashpal S Potiwal	71	½ - ½
Andrew Parker	46	0 - 1

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

-216 = (518 + 400 * (0 - 4)) / 5)