Event: Altrincham

PDF Excel

Opponent	Rating	Result
Wiktor Lech	0	1 - 0
George Seaman	0	1 - 0
Hugo Wilkinson	1310	0 - 1

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

570 = (1310 + 400 * (2 - 1)) / 3)