Event: Mamhead league

PDF Excel

Opponent	Rating	Result
Michael H Stinton-Brownbridge	154	0 - 1
Alan J Dean	140	0 - 1
Andrew S Kinder	147	½ - ½

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

-120 = (441 + 400 * (0 - 2)) / 3)