Player Diving at Division Line
 

A1 is dribbling in the backcourt.

a) A1 loses control of the ball and the ball rolls into the front court. No other player touches it and A1 dives on the floor such that his arms have grabbed the ball while his legs are still in the backcourt.

Once the ball crosses the division line the 10 second count is stopped (Situation 9.8B) and the ball has front court status. 9-8-2 reads "a player shall not cause the ball to go from backcourt to frontcourt and return to backcourt." By A1 grabbing the ball with his legs still in the backcourt, does that make it a violation? I am thinking that it would be the same thing as picking the ball up while standing and straddling the division line.

b) A1 loses control of the ball and the ball rolls into the front court. B1 taps the ball into the backcourt and A1 dives on the floor such that his arms have grabbed the ball while his legs are still in the frontcourt.

Not a violation since A would have a new 10-second count and would not have all three points across the division line yet.

Are there any other situation you can think of where a player laying down at the division line would be important?

The 1 in 1000 games this may happen in my game I'm not calling a BC violation in 1 and a BC violation in the other. You have made simple concepts overly confusing.

(a) is a violation.

(b) not a violation.

Pretty simple situations if you use the 4 critera...
1. Team control
2. The ball has front court Status
3. Team A last touches the ball BEFORE it returns to the backcourt
4. Team B first touches the ball AFTER it returns to the backcourt

Why doesnt the points sitch apply. As in ball n 2 feet?

3 points only applies during a dribble (player control). In A, it's an interrupted dribble (no player control) so it does not apply.