Event: Lytham Club Championship

PDF Excel

Opponent	Rating	Result
Peter Martin	0	1 - 0
David E Aspinall	140	0 - 1
Keith Sansom	91	0 - 1
Colin Wilks	113	0 - 1
Yvonne S Taylor	41	1 - 0

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

-3 = (385 + 400 * (2 - 3)) / 5)