Event: First Mike Duck Online Tournament

PDF Excel

Opponent	Rating	Result
Jon P Manley	0	0 - 1
Chris Finn	0	0 - 1
Ivon S Asquith	0	1 - 0
Graham L Cole	0	0 - 1
Jan Murawski	0	0 - 1

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

-240 = (0 + 400 * (1 - 4)) / 5)