Event: Doncaster League

PDF Excel

Opponent	Rating	Result
Zak Tomlinson	147	0 - 1
Colin Parrish	100	0 - 1
Tim Prosser	136	½ - ½
John E Beech	123	½ - ½
John P Mainwaring	136	½ - ½

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

-32 = (642 + 400 * (0 - 2)) / 5)