Event: Walker Shield

PDF Excel

Opponent	Rating	Result
David Erwee	100	0 - 1
Andy Flood	110	1 - 0
Malcolm Snashall	110	0 - 1
Andrew M Haycock	96	0 - 1
Leon A Garfield	101	0 - 1
Joshua Vaughan	94	0 - 1
Robert Cronin	101	½ - ½

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

-127 = (712 + 400 * (1 - 5)) / 7)