And here we go! Although it doesn't get us any closer to an answer it certainly helps us understand why this is such a difficult and divisive call.
"Perry,
This is a difficult play to officiate because a lot depends on the nature of the last touch/dribble by B-2.
I’ll take you through the play as best I can.
When the shot is taken by A-1, there is no longer any team control.(Rule 4-9.4.c) When B-1 catches the ball and “throws” it off the leg of A-2, the throw entails control by B-1 and Team B. This Team B control continues during the pass from B-1 which goes off the leg of A-2. When B-2, who is in his front court with two feet on the floor, touches and dribbles the ball which has never crossed over the division line, the key to the play arises. If B-2 begins an immediate dribble, then 9-12.3.c applies and there is no backcourt violation. On the other hand, if B-2 touches the ball and then starts a dribble, it would seem to me that 9-12.3.a applies and the result is a backcourt violation since both the player and the ball had been in the front court.
Tough play, but I hope this helps."
Wow. Interesting response, and I would seriously doubt every official would have this understanding of the rule. Pretty cool, he did take a look at the play and write you back. I guess, I can live with it being a violation, but this is just nearly as complicated as what a catch is in the NFL. Sure would be hard to be an official - in any sport at a high level