Event: Div1

PDF Excel

Opponent	Rating	Result
David Latham	181	½ - ½
Esteve Mateu Guiu	184	0 - 1
Simon N Gilmore	188	½ - ½

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

51 = (553 + 400 * (0 - 1)) / 3)