Event: City Chess Swiss 2018-19

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Opponent	Rating	Result
Alex Wickens	0	1 - 0
Sandesh Tathare	0	0 - 1
Joseph S Rees	0	0 - 1
David R Chambers	0	1 - 0
Matthew Chapman	0	1 - 0
Jacques Tivillier	0	1 - 0
Michael JM Rose	0	0 - 1
Geoff W Naldrett	0	½ - ½

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

50 = (0 + 400 * (4 - 3)) / 8)