Event: MID County / Lewis Cup

PDF Excel

Opponent	Rating	Result
James M Wheeler	160	½ - ½
Charlie Metcalfe	158	1 - 0
Barrington Beavis	143	½ - ½
David JR Barnes	161	½ - ½
Stephen D Blewitt	162	½ - ½
C Lucjan Karpinski	172	1 - 0
Chris Marshall	146	½ - ½

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

272 = (1102 + 400 * (2 - 0)) / 7)