Event: Div2

PDF Excel

Opponent	Rating	Result
Gary Monks	133	½ - ½
John D Hoddy	140	1 - 0
Yuriy Slobodyuk	125	0 - 1

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

133 = (398 + 400 * (1 - 1)) / 3)