How to Beat a 2-3 Zone: The Chin Play That Splits the Middle
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A 2-3 zone works because of one player: the defender in the middle of the back line. He protects the rim, takes away the high post and helps on every drive. Most offenses attack a 2-3 by passing around the perimeter and hoping for an open three. A better plan is to give that middle defender two jobs at once, so whatever he chooses leaves something open.
The Princeton offense has a set built for exactly that. It is called Chin vs. Zone, and it takes three steps.
Why the 2-3 zone is hard to beat
- The rim is protected. The middle defender sits in the lane, so drives and post feeds meet help immediately.
- The top is crowded. Two guards up top pressure the ball and close the gaps for dribble penetration.
- Cutters get passed off. Instead of following a cutter, zone defenders hand him to the next defender, so the cuts that work against man-to-man go nowhere.
The weak spot is the space between the top defenders and the middle defender. The middle man cannot guard a player flashing to the elbow and a player cutting behind him at the same time. Chin vs. Zone puts two players there on purpose.
Chin vs. Zone, step by step
Start in a 2-2-1: guards 1 and 2 in the slots, 3 and 4 on the wings, and 5 at the ball-side high elbow.
Step 1: Wing entry
2 passes to 4 on the wing. The ball moving to the side pulls the top defender and the wing defender toward the ball and starts shifting the zone.
Step 2: Screen the top, cut behind the middle
5 sets a screen on the top defender closest to 1 (X1 in the diagram). 1 cuts off the screen, through the gap, and all the way to the rim, finishing behind the middle defender (X5). The timing matters: 1 should not leave until the screen is set, or X1 simply follows him.
Step 3: Flash to the elbow and read the middle
As 1 clears the lane, 5 opens up and flashes to the ball-side elbow. 4 passes to 5. Now the middle defender has a problem.
The reads
| If the defense does this | Do this |
|---|---|
| The middle defender steps up to guard 5 at the elbow | 5 drops a bounce pass to 1, who is sitting behind him at the rim. |
| The middle defender stays home under the basket | 5 catches and shoots the open elbow jumper. |
| The wing defender sinks to help on 5 | 4 takes one dribble up (a wing dribble lift) to open the corner three. |
| A back-line defender slides up to the elbow | Look for the short-corner duck-in on the side he left. |
Coaching points
- 5 has to be a shooter. If your 5 cannot make a 15-foot jumper, the middle defender will stay home every time. Put your best mid-range shooting forward in that spot.
- Screen first, then cut. In man-to-man the Chin cutter leaves when the ball leaves the passer's hands. Against a zone, the screen on the top defender has to land first.
- Hold the spacing. 2, 3 and 4 stay wide. If they drift in, the zone gets help it should not have.
- Run it more than once. The first time, the zone gives up a layup or a jumper. The second time, the adjustment it makes opens the corner three.
How to practice it
Walk it 5-on-0 until the timing is automatic: entry, screen, cut, flash. Then run it 5-on-5 against your own 2-3 zone. Give 4 points for a layup by the cutter, 3 for a corner three and 2 for the elbow jumper, so players learn to take what the middle defender gives them.
Get the full play diagrams
Chin vs. Zone is one of 14 sets in the Princeton Offense Play Diagrams, each drawn step by step with its reads and counters. For the full system behind it, including how to teach the reads and counter switching and sagging defenses, see the Princeton Offense Playbook, or get both in the Princeton Complete bundle.