Event: Lytham Summer Tournament

PDF Excel

Opponent	Rating	Result
John Regan	104	1 - 0
Dennis Davies	103	½ - ½
Peter A Wilson	145	0 - 1
Peter Martin	0	1 - 0
David E Aspinall	140	½ - ½

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

178 = (492 + 400 * (2 - 1)) / 5)