Event: SCL Div 4

PDF Excel

Opponent	Rating	Result
John Comber	0	0 - 1
Hardeep Chahal	0	0 - 1
John Kooner	0	0 - 1
Ken Wyld	0	0 - 1
Ian D Parker	0	0 - 1

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

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