Event: SCL Div 5

PDF Excel

Opponent	Rating	Result
Richard F Smith	0	0 - 1
Robert Sims	0	0 - 1
Chris E Kenward	0	½ - ½
Malcolm Day	0	0 - 1
Kenneth Wertheim	0	½ - ½

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

-240 = (0 + 400 * (0 - 3)) / 5)