Event: Div4

PDF Excel

Opponent	Rating	Result
Stuart Smitton	67	0 - 1
Gilberto Templo	63	0 - 1
John Moughtin-Leay	76	0 - 1
Barry W Lings	97	0 - 1
Terry Knight	56	0 - 1
Stuart Smitton	67	1 - 0
Gilberto Templo	63	½ - ½

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

-159 = (489 + 400 * (1 - 5)) / 7)