Event: Belper Club Championship

PDF Excel

Opponent	Rating	Result
Martin Cobham	0	0 - 1
Nigel D Marshall	0	1 - 0
Dean M Hartley	0	0 - 1
Roger Moors	0	0 - 1
Edward Brown	0	0 - 1

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

-240 = (0 + 400 * (1 - 4)) / 5)