Event: D&DCL Div 2

PDF Excel

Opponent	Rating	Result
John S Shaw	139	0 - 1
Brian Lever	112	½ - ½
David Hoddy	128	½ - ½

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

-7 = (379 + 400 * (0 - 1)) / 3)