whats the effect on the bkr for a newly added game on the site ? is it better for your bkr to wait until your opponents have at least a (prof) ranking ? or is it just as good for the bkr to play other players who play the game for the first time ?

we had great fun with some fast hyper gammon games yesterday .. but it seems that players who joined the fun later have a higher bkr now although they have the same ratio of won/loss games (or even worse ;))