Event: Rapidplay

PDF Excel

Opponent	Rating	Result
Warren Harvey	0	0 - 1
Warren Harvey	0	0 - 1
Kevin Birch	0	0 - 1
Kevin Birch	0	0 - 1
Simon N Rogers	0	0 - 1

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

-400 = (0 + 400 * (0 - 5)) / 5)