Event: SCL Div 4

PDF Excel

Opponent	Rating	Result
Alan S Willis	0	0 - 1
Jerry Ingamells	0	0 - 1
John E Davis	0	0 - 1
Steve R Dunleavy	0	1 - 0
Richard Slade	0	½ - ½

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

-160 = (0 + 400 * (1 - 3)) / 5)