Event: u1850 County Championship

PDF Excel

Opponent	Rating	Result
Marcin Rodzik	1450	1 - 0
Sergejs Starodubcevs	1708	1 - 0
Michelle Ngo Yu Chan	1822	1 - 0
Francis J Bowers	1843	1 - 0
Alan Watkins	1821	½ - ½
Paul Walton	1833	½ - ½

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

2013 = (10477 + 400 * (4 - 0)) / 6)