Event: Doncaster League

PDF Excel

Opponent	Rating	Result
Alan Bramall	145	½ - ½
Sean O McDonald	162	0 - 1
Robert Bacon	104	1 - 0
Peter JE Ackley	191	0 - 1
Sean O McDonald	154	½ - ½

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

71 = (756 + 400 * (1 - 2)) / 5)