Event: Div2

PDF Excel

Opponent	Rating	Result
Jonah B Willow	209	0 - 1
Kevin J Dalley	171	½ - ½
Stephen Lamont	128	0 - 1
Esteve Mateu Guiu	184	½ - ½
Roy Woods	146	1 - 0

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

88 = (838 + 400 * (1 - 2)) / 5)