I like to give independent opinions, so I haven't read what others said yet, but here is my take....
- I personally feel it is a foul when the cb hits the chalk. This should be ball in hand in the kitchen; we just don't know what would have happened if it didn't hit the chalk, and it must be a foul ball in hand.
Confusingly however, I personally feel strongly that since the cb didn't leave the playing surface (the true objective of that shot), the ball doesn't spot, no ball in hand, and the game is over. The reason is that the benefit of the doubt has to go to the non fouler, and the shooter effectively didn't accomplish his objective.
I don't think our rules are the best, and if I was a TD i'd feel comfortable doing the above,even though the statements conflict with one another. I don't think it is right to reward infringements in ambiguous situations. If the rules were more A+ caliber, like say in golf, i'd be much more inclined to follow the rules to the letter as a TD.