Deal 12
 
 
 
♠ 8 7 5
K 8 7 5 3
A K 5
♣ 10 2
 
 WEST  NORTH  EAST  SOUTH
2♣
pass2pass3♣
pass3NTpass4NT
pass5pass5NT
pass6pass7♣
passpasspass

South is to play 7♣. West leads the Q.

Make a Plan, then click NEXT .
   
  ♠ A K 2
A 4
8 4
♣ A K Q J 9 5
 

 
Deal 12
 
   7♣
OL: Q
♠ 8 7 5
K 8 7 5 3
A K 5
♣ 10 2
  South is to play 7♣. West leads the Q.

Losers:   ♠ = 1    = 0    = 0   ♣ = 0   Total = 1

It should be very clear that the only way to get rid of that ♠ loser is to discard it on dummy's suit. So after taking the first trick with dummy's A you could pull trumps, then play A, K and ruff a . IF the s split 3-3 you could then enter dummy with the K and discard your loser.

The problem is that the s are much more likely to split 4-2, in which case you will need to ruff twice to establish a winner. That means you will need an extra entry to dummy.

That extra entry can only be the ♣10 so you must delay pulling trumps until after you ruff the first . Win the A and immediately play A, K and ruff a with a high ♣. West discards on this play. Enter dummy with a trump and ruff another high. The suit is now established, so you pull trumps, enter dummy one last time with the K and discard that losing ♠ on the good 8.

Click NEXT for the complete Deal.
   
  ♠ A K 2
A 4
8 4
♣ A K Q J 9 5
 

 
Deal 12
 
   7♣
OL: Q
♠ 8 7 5
K 8 7 5 3
A K 5
♣ 10 2
  It may have seemed too risky to play s before pulling trumps. In fact, there was no risk at all. If the s were splitting 5-1 then you had absolutely no chance of making the contract.

And if they had split 3-3 this Plan would still have worked.

 Deal 13 
♠ J 9 6 3
J 2
Q J 10 7 6
♣ 8 4
♠ Q 10 4
Q 10 9 6
9 3 2
♣ 7 6 3
  ♠ A K 2
A 4
8 4
♣ A K Q J 9 5