It depends heavily on whether or not it is Tuesday.
Scoring

http://www.chess.com/article/view/chess-ratings---how-they-work
However, on Tuesdays the rating formula changes to 6x9=42.

By "scoring" do you mean the ratings for the players? Here's a link for an explanation of ratings.
EDIT: Whoops! Sorry oinq, somehow I missed that you had just posted the very same link.
How does the scoring work for live chess ?
There is obviously some sort of formula.
Thanks