Son

How is son calculated in tournament rankings?

Found an answer:  http://senseis.xmp.net/?SonnebornBerger

make the sum of the products obtain as follows

for each game you played, multiply your score of that game with the total points earned by that player.

(hence even if 2 players have finished all their games and one is leading the other by tie-breaking son, they still can chnage places due to the outcome of a other game)

see also "What is Son?" on http://www.edcollins.com/golem/