Event: Walker Shield

PDF Excel

Opponent	Rating	Result
Andy Flood	110	0 - 1
Oli Garrett	76	0 - 1
Joshua Vaughan	94	½ - ½
Graeme Boxall	93	1 - 0
Andy Flood	110	0 - 1
Clive J Le Baigue	111	0 - 1
Malcolm Snashall	110	1 - 0

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

-14 = (704 + 400 * (2 - 4)) / 7)