Event: Hutchinson

PDF Excel

Opponent	Rating	Result
Julian Toothill	0	½ - ½
David Copland	0	1 - 0
Steve Harrington	121	0 - 1
Derek Ludlam	106	0 - 1

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

-43 = (227 + 400 * (1 - 2)) / 4)