Diagram 2-3 (1) - Defenders are in their original positions: X1 and X2 at the heard of the key area, X5 below the broken line of the free-throw-circle, and X4 and X3 at the lower wing positions. Offensive player 1 has the ball out front at the top of the key. Seeing there are four defensive players to his left calls, "Strong-side left!" or simply, "Left!" and immediately shifts to the head of the key. Simultaneously, X2 moves toward 3, X4 holds his position, X3 slides up toward the foul-lane area, and X5 comes up to cover 5. The arrows indicate this movement. X1 should drop off his position so that 5 is covered both front and back

Diagram 2-3 (2) - Player 1 has passed the ball to 2. The arrows moving into the defensive positions indicate the slides as the zone shifts while the ball is in the air to the position of the ball. X1 moves from the top of the key to front the high post 5 on the ball side. X5 moves from the foul lane to the medium-post area. X4 drops back as 4 drops back. X2 moves toward 2 to challenge the ball. X3 plays an intercepting angle on 3. Should 5 slide to a medium or low post position, X5 fronts him. X4 is positioned to help X2 at the ball position or to play 4 should he receive a pass.

Diagram 2-3 (3) - Offensive player 2 has passed to 3. 3's corner position is a good trapping area. On 3's reception, X4 the baseline trapper, and X2 the side trapper springs the trap having moved while the ball was in the air. At that same time X1 leaves the free-throw circle area and denies any pass back to 2. X5 fronts 5 in the post area. X3 is the interceptor and should anticipate 4's pass-out direction by observing his eye and arm movement. X3 has a good intercepting angle if he can anticipate a pass from 4 to 1, but if he misinterprets, a pass to 3 will result in an easy basket. The trap will be effective if the trappers do not slap or grab at the ball and everybody coordinate their movement.

Diagram 2-3 (4) - Offensive player 4 has made an outlet pass to 5, who moved from the medium to high post. X1 pressures the ball, moving from the position he had on 2 in the previous diagram to a high position on 5. X5 slides up the foul lane to a low, aggressive defensive position on 5. X4 must drop toward the foul lane to protect against movement in this are by 5 if he can get around X5. X2 and X3 must be alert. X2 has moved from the double-team on 4 to a position inside of 2. X3 must be aware of the weak-side under-the-basket possibilities of player 3.

Diagram 2-3 (5) - Offensive player 5 passes the ball to his teammate 3 on the weak-side of the court. X3 closes-out cautiously on 3. While the ball is in the air X5 moves from the high-post to a low protective position on the ball-side of the court continuing to front 5. X5 must be conscious of the open low-post area. X4 alerts X5 that 4 has moved to the opposite low-post position. X2 moves high toward the ball side of the floor. X4, moving protectively into the low center of the foul lane, must be aware of the possibility of 2 cutting behind him to the basket or splitting the zone defenders by moving into the middle area to post as a medium pivot on the strong side.

Diagram 2-3 (6) - Offensive player 3 has passed to 4, who has moved from the low-post to the corner. Normally, 4 would receive this pass moving toward the sideline with his back to the basket and would have to pivot to make a move toward the basket. His corner position offers the defense a good trapping area. X3 moves with the pass to the baseline trap position. His first responsibility is to prevent a baseline drive and second is to apply the baseline low-trap. X1 moves off the high pivot quickly to assume the sideline high-trap position. X2 moves to cut-off the passing lane back out to 3. X5 delays his move until X3 reaches the baseline position then moves up on 5, fronting him in this post position, cutting off a passing lane. X4, at the weak-side foul lane, anticipates a long lob pass out to 1 by observing 3's eye and arm movement and moves to make the interception; however, since he is the last line of defense, X4 must be ready to drop back if X3 does not contain 3. X5 moves up to front 5.