Event: Haslemere Trophy

PDF Excel

Opponent	Rating	Result
Zac Welling	835	0 - 1
Paul D Armiger	0	1 - 0
Zac Welling	835	0 - 1
Paul D Armiger	0	0 - 1

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

218 = (1670 + 400 * (1 - 3)) / 4)