Event: Div 2

PDF Excel

Opponent	Rating	Result
Andrew Townsend	0	0 - 1
Norman J Davies	0	½ - ½
Jonathon Swift	100	½ - ½

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

-100 = (100 + 400 * (0 - 1)) / 3)