One defender on the ball at the top, three across the middle of the floor — two on the wings and one at the free-throw line — and one defender running the baseline from block to block. It is the most aggressive of the common zones and the one that looks least like a wall.
Why coaches use it
It puts a hand in every passing lane a young team likes to use. The wing entry is contested, the swing pass across the top is contested, and the top man can turn the whole thing into a trap on the sideline. It is also the easiest zone to extend into a three-quarter-court press, which is why teams that want to speed a game up play it.
The trade is real. The baseline runner is the only defender along the back line. He cannot be in both corners, and nobody is standing in the low middle in front of the rim.
How to attack it
- Get somebody in both corners. One defender covering two corners is the structural flaw. Make him run the full width of the floor twice.
- Flash into the low middle. When the baseline runner goes to a corner, the space he leaves in front of the rim belongs to nobody. Dive into it on the corner catch.
- Sit in the short corner. Same idea, one step further out, and it drags the runner off the block.
- Use the high post as a passer, not a scorer. A catch at the free-throw line with the eyes up gets the ball to both of the above.
- Crash the offensive glass. A 1-3-1 has nobody boxing out the weak-side block by assignment.
Draw your corner-attack set once, set the zone to 1-3-1 in SlongeHoops, and watch which defender ends up covering two people. The simulated defense is in Beta and shows you positioning, not outcomes.