Event: Lytham Summer Tournament

PDF Excel

Opponent	Rating	Result
David E Aspinall	139	0 - 1
Raymond J Pomeroy	120	0 - 1
John Cox	85	1 - 0
John Regan	112	1 - 0
Robert Tinton	125	½ - ½

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

116 = (581 + 400 * (2 - 2)) / 5)