Event: Durham League Division B

PDF Excel

Opponent	Rating	Result
Ralph Taylor	0	0 - 1
Graham W Matthews	1592	0 - 1
Stephen Brown	0	1 - 0
Philip Brooks	1581	0 - 1

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

593 = (3173 + 400 * (1 - 3)) / 4)