Forcing left shell
 | 1 Ian MacKinnon Shell drill for the forcing-left defence, work on drive-and-kick situations. 1) 3-out 2-in a) Middle drive from the (defensive) left wing 2 has the ball to start, - X2 forces left - X1 gaps - X3 and X4 are on the midline - X5 defends 5 in the low post 3/4 high side. 2 beats X2 to the middle (with his left hand), X1 is the help. |
 | 2 When 2 passes, X1 stays with 2, X3 takes first pass (to 1 or 3), X2 (who got beat) goes opposite the pass and has leftovers, he takes whichever attacker is left open, here 3. If 2 passes to 3, X3 takes him and X2 covers 1. 1 passes to 3. |
 | 3 X2 forces ballhandler 3 left, X3 denies 1, X1 and X5 are on the midline, X4 full fronts 4 if the ball is above the line of 45 or defends 3/4 from the bottom if the ball is below 45. 3 skip passes to 2, repeat (perimeter defenders have changed positions). |
 | 4 b) Drive from the top 1 beats X1 with his left hand, X3 stays with 3 (a shooter), weakside X5 helps (not X4) and X2 shoots the gap to help the helper. |
 | 5 On a pass to 2 (a difficult pass), X5 stays with 1, X2 fronts 5 (a mismatch), beaten man X1 chases the pass to take 2, the attacker left open (there is only one open attacker). |
 | 6 c) Baseline drive from the right wing X4 fronts 4 if the ball is above 45. As 3 drives baseline, X4 gets to 3/4 low side then traps 3 with X3, X5 takes 4 who i-cuts to the elbow on the drive, X2 sinks to cover 5 and X1 fills. 1 and 2 also space on penetration. |
 | 7 X1 has first pass out of the trap, X3 goes opposite the pass and has leftovers. Here the pass goes to 2, X1 takes him and X3 covers 1. X2 full fronts 5 (a mismatch), X4 stays with 3 and X5 stays with 4. See the Mavs halfcourt man defence. |
 | 8 Here the pass goes to 1, X1 takes him and X3 covers 2. |
 | 9 Progression To combine all three situations and go competitive, 1 drives from the top and passes to 2 who will then drive middle, the ball is passed to 3, play is live on the baseline drive by 3. Three attacks then switch teams, keep score. |
 | 10 2) 4-out 1-in motion The ball starts with 2 and is reversed, 4 basket cuts on the pass to 3, X4 jumps to the ball, 1 and 2 fill behind 4, X1 denies a pass from 3 to 1. On the pass from 2 to 1, X2 gaps to help defend a pass into the ballside low post, and gives up a return pass to the wing. The offence should want to swing the ball to the other side, not back to the same wing. This can be a match-up decision. |
 | 11 X4 stops on the midline when 4 clears weakside. 3 drives baseline and is trapped by X3 and X5, X4 takes 5 on the i-cut, X2 sinks. |
 | 12 X2 takes a pass to "baseline most" 4, the weakside attacker closest to the baseline, X3 takes 2 on the pass. |
 | 13 If the pass goes to 2, X3 takes him and X2 again covers baseline-most 4. If X2 were to take 2, then 4 would be open cutting to the basket. If 1 doesn't fill behind the drive, X1 could be closer to 2 than X3 is and would take 2 on the pass. |
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