Event: County Championship

PDF Excel

Opponent	Rating	Result
Murray D Smith	2188	0 - 1
Paul A Hutchinson	2083	1 - 0
Francis J Bowers	1855	0 - 1

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

1909 = (6126 + 400 * (1 - 2)) / 3)