Event: 5th Somerset New Year Major

PDF Excel

Opponent	Rating	Result
Tim Jones	1766	0 - 1
Robert P Radford	0	1 - 0
Peter Jones	0	½ - ½
Ben Radford	0	½ - ½

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

442 = (1766 + 400 * (1 - 1)) / 4)