Event: Dave Welch 7200 League

PDF Excel

Opponent	Rating	Result
Peter O'Driscoll	1881	0 - 1
Ron Harrison	1916	½ - ½
Luke S Boumphrey	1981	½ - ½

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

1793 = (5778 + 400 * (0 - 1)) / 3)