What does “Son” mean in the tournament section next to the points column?

If you read the FAQ - the answer is there, under tournament scoring. Or, it has been asked before

http://www.littlegolem.net/jsp/forum/topic.jsp?forum=1&topic=625

Essentially, it is used for a tie-breaker, and is

“… the sum of the following products. For each opponent (the score you got against him) times (the points of the opponent for his wins/losses/draws in that tournament)….”

TnT you spoiled a nice puzzle… people should take some finished tourneys and try to figure it out themselfs…