Event: Old Wilsonians Chess Match

PDF Excel

Opponent	Rating	Result
Meikum Perumal Mahadevan	1170	0 - 1
Han-Joon Kymm	0	1 - 0

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

585 = (1170 + 400 * (1 - 1)) / 2)