Event: SCL Div 5

PDF Excel

Opponent	Rating	Result
Syd A Eva	0	0 - 1
Maha Chandar	0	0 - 1
David C Anderson	0	0 - 1
Darrell Sturmey	0	0 - 1
Tom S Meldrum	0	0 - 1

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

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