The numbered break, Dean Smith's lane system. 4 rebounds, 1 opens to the right sideline for the outlet, 2 and 3 are already wide, and 5 is leaving. Same lanes every trip, make or miss.

4 chins the ball, pivots to the sideline, and outlets to 1 with two hands over his head. Sideline, never the middle, because the middle is where the defense is sprinting back.

1 pushes to the middle third with his head up. 2 and 3 sprint the sidelines to the corners, not the wings, so the two defenders back have to pick the lane or the ball. 5 runs rim to rim.

1 reaches the top with the ball live. 2 bounces off the baseline back to the wing so the catch comes to him. 4 trails last to the weak slot, which is why the paint stays empty for 5.

Pitch ahead. The read is the defender at the nail. If he is home, 1 does not drive him, he throws to the wing, because the pass beats him there and the dribble does not.

X2 closes out hard, so 2 attacks the closeout along the baseline. A wing who catches on the move with a defender flying at him has the drive before the defender has his feet.

X5 steps up to stop 2, so 2 drops it to 5 at the rim. If the pitch had been denied, the counter is 2 crossing under to the far corner and 1 keeping his dribble into the open seam.

5 finishes. Two or fewer defenders back, score in two or fewer passes, Roy Williams's rule. Otherwise pull it out and flow into the secondary without stopping.

1 pushes the ball up the middle and 2 and 3 sprint wide to the sidelines, ahead of the ball, because a wing who runs inside the lane line brings his defender into the paint with him.

1 drives at the top defender and stops at the free-throw line, never deeper, so he keeps both passing lanes; X1 steps up to stop the ball, which is the commitment 1 was waiting for. The wings fill the free-throw line extended.

X1 committed, so 1 passes to 2 on the left wing. X2 rotates up to take the first pass because the low man in the stack owns the wings; the top man owns the ball.

2 catches and shoots in rhythm with no dribble, because the drill allows one shot per trip and the advantage dies the moment the ball hits the floor.

The shot misses and X1 turns and goes to the rim for the rebound, so the defense converts to offense without a pause; 2, the shooter, is the only one who gets back.

X1 secures the rebound. 2 is already sprinting back alone, because the shooter is the safety on every trip. 1 and 3 clear to the baseline and wait their turn; nobody else retreats.

X1 pushes the ball up the middle and X2 runs the right lane wide, so the 2-on-1 attacks the rim before any help can arrive; 2 gets to the free-throw line first and squares up.

2 drops to the lane and contains the ball with his hands up, gives ground, and makes the two attackers beat him with a contested shot, because one defender who stops the ball first forces the pass and buys time. Two new players join X1 for the next 3-on-2.