Event: Essex Summer Rapid Knockout

PDF Excel

Opponent	Rating	Result
Neville H Twitchell	1850	0 - 1
Neville H Twitchell	1850	0 - 1

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

1450 = (3700 + 400 * (0 - 2)) / 2)