Deal 18
 
 
 
♠ K 6
8 5 4 2
K 8 7 2
♣ 9 5 4
 
 WEST  NORTH  EAST  SOUTH
pass1♠
pass1NTpass4♠
passpasspass


Make a Plan, then click NEXT .
   
  ♠ A Q J 9 7 4
A 6
A Q
♣ 6 3 2
 

 
Deal 18
4♠
OL: K
 
♠ K 6
8 5 4 2
K 8 7 2
♣ 9 5 4
  South is to play 4♠. West leads the K.

Losers:   ♠ = 0    = 1    = 0   ♣ = 3   Total = 4

This is a very easy problem to be up here at number 18! Clearly you have to discard one of those 4 losers on the only card dummy has, the K.

Just as clearly you have to be able to enter dummy after you unblock the A Q so you can't pull trumps immediately.

So here's the Plan.
Win the A.
Pull one round of trumps with the ♠A.
Play the A Q to get them out of the way.
Enter dummy with the ♠K.
Play the K, discard a loser, and hope nobody ruffs.

 NEXT 
   
  ♠ A Q J 9 7 4
A 6
A Q
♣ 6 3 2
 

 
Deal 18
4♠
OL: K
 
♠ K 6
8 5 4 2
K 8 7 2
♣ 9 5 4
  Just remember to always pull trumps immediately . . .

. . . except when you have a good reason not to, like here.

 Deal 19 
♠ 8 3
K Q J 7
10 6 4
♣ A J 10 7
♠ 10 5 2
10 9 3
J 9 5 3
♣ K Q 8
  ♠ A Q J 9 7 4
A 6
A Q
♣ 6 3 2