Event: Lytham Club Championship

PDF Excel

Opponent	Rating	Result
Colin Wilks	113	1 - 0
Rob Gallagher	158	0 - 1
Ken Hopwood	0	1 - 0
Darren Pickering	119	½ - ½

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

198 = (390 + 400 * (2 - 1)) / 4)