Event: D&DCL Div 1

PDF Excel

Opponent	Rating	Result
Andrew Robins	139	0 - 1
Derek A Jarvis	173	0 - 1
D Ashcroft	152	0 - 1
Stephen Lamont	143	1 - 0
Derek A Jarvis	173	½ - ½

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

-4 = (780 + 400 * (1 - 3)) / 5)