Event: Ipswich Chess Club Championship

PDF Excel

Opponent	Rating	Result
James Stow	1094	½ - ½
Yaroslav Orishko	2014	0 - 1
Luke Griffin	1400	1 - 0(def)

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

1354 = (3108 + 400 * (0 - 1)) / 2)