playBunny: It seems like related subject to this is how to reward the rating points for Backgammon on this site. Single games seem disproportionally in favor of the player who is rated lower when his rating is more than 60 point behind his opponent. I am thinking that as the match length is increased it becomes more fair from the higher rated player's perspective and this accounts for why the higher rated players will play me even though I am 200 or more points behind them in rating.