Event: County Championship

PDF Excel

Opponent	Rating	Result
Joe Kilshaw	0	0 - 1
Robert K Taylor	0	0 - 1
Denis Georgiou	0	0 - 1
Martin Pettinger	0	1 - 0
Raymond J Ilett	0	1 - 0

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

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