Event: LADDER

PDF Excel

Opponent	Rating	Result
Ben Glyn-Jones	0	0 - 1
Peter Larwood	0	0 - 1
Jon Young	0	0 - 1
Ben Glyn-Jones	0	0 - 1
Chris Jones	0	0 - 1

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

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