Event: A Division

PDF Excel

Opponent	Rating	Result
William O'Rourke	156	0 - 1
Matt Smith	0	0 - 1
Marlon Espiritu	132	1 - 0

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

-37 = (288 + 400 * (1 - 2)) / 3)