Event: Rapidplay League

PDF Excel

Opponent	Rating	Result
Mark Taylor	161	0 - 1
Mark Taylor	161	0 - 1
John Addison	143	0 - 1
John Addison	143	0 - 1

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

-248 = (608 + 400 * (0 - 4)) / 4)