Event: Division Two

PDF Excel

Opponent	Rating	Result
Brian Yarker	132	0 - 1
Bill Tait	140	1 - 0
Ian Craig	0	½ - ½
Les Johnson	124	0 - 1

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

-1 = (396 + 400 * (1 - 2)) / 4)