Event: Hutchinson

PDF Excel

Opponent	Rating	Result
Julian Toothill	116	0 - 1
Simon Jones	98	½ - ½
Derek Ludlam	114	0 - 1
Mahboob Nawaz	115	0 - 1
Nicholas Waite	95

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

-189 = (443 + 400 * (0 - 3)) / 4)