Event: Durham League Division 2

PDF Excel

Opponent	Rating	Result
Thomas Mitchell	0	0 - 1
Geoff Raw	0	1 - 0
Garry J Hewitt	0	0 - 1
Robert Berry	0	0 - 1
Graham R Marshall	0	1 - 0

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

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