Constraints: "3" cannot enter until ball crosses midcourt; 4 only enters ball.
Complexity: initial 2 versus 3 pressure (could play 3 +1 versus 4 or number of your choice)
options: 1) no dribbling, 2) limit number of dribbles, 3) defense to offense after stop or score
Feedback: importance of moving without the ball and passing early to open player
Note: I frequently like to constrain dribbling, forcing emphasis on cutting.