1 can pass to 2 or 3, X1 must jump to the ball on the pass (in a game, don't over-run, you may have to chase down your guy on a flare screen). Rotate attackers, keep the defender in.
Variation - the attackers can do anything but shoot, defenders must respect the pack-line (16 feet from the basket) except if coach tells the ballhandler to pick up his dribble, then they deny.