I was playing a person the other day and I noticed that he, on certain cut shots, approximately 40 degrees or more, would first point his cue towards the target pocket in back of the OB about one inch from the OB. Then without lifting his cue he would pivot over center CB. On occasion this would leave a chalk mark on the table and he would then proceed to aim for the chalk mark and pocket the ball. My question is this. Would that be legal in tournament play? He was having great success with this method and if it's legal, I would certainly like to know.