Event: Kenneth Appleby

PDF Excel

Opponent	Rating	Result
Peter J Clark	111	0 - 1
Neil Harris	39	1 - 0
Jim Bird	98	0 - 1
John Light	87	0 - 1
Barry Fulthorpe	78	1 - 0

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

3 = (413 + 400 * (2 - 3)) / 5)