Event: City Chess League 2019-20

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Opponent	Rating	Result
Declan A Kilcline	0	0 - 1
Dragomir Zarev	0	1 - 0
David R Sedgwick	0	1 - 0
Tony D Wells	0	0 - 1
Robert F Willmoth	0	0 - 1

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

-80 = (0 + 400 * (2 - 3)) / 5)