Event: City Chess Swiss 2018-19

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Opponent	Rating	Result
David A Morgan	0	0 - 1
Fraser A Lees	0	0 - 1
Martin Lake	0	0 - 1
Travis Shafer	0	0 - 1
Azmiddin Aminov	0	0 - 1

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

-400 = (0 + 400 * (0 - 5)) / 5)