Event: Lytham Club Championship

PDF Excel

Opponent	Rating	Result
Rob Gallagher	157	0 - 1
Yvonne S Taylor	0	1 - 0
Philip N Raynor	142	0 - 1
Dennis Davies	109	0 - 1
Graham Taylor	118	0 - 1

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

-135 = (526 + 400 * (1 - 4)) / 5)