Deal 8
 
 
 
♠ A 2
9 3
A K 8 6
♣ K Q 10 6 5
 
 WEST  NORTH  EAST  SOUTH
1♣
pass2pass3♣
pass4♣pass4
pass4♠pass6♣
passpasspass

South is to play 6♣. West leads the K.

Make a Plan, then click NEXT .
   
  ♠ Q 7
A 4
Q 5 4
♣ A J 9 7 3 2
 

 
Deal 8
6♣
OL: K
 
♠ A 2
9 3
A K 8 6
♣ K Q 10 6 5
  You have 11 top tricks and hope for a 3-3 split to give you one more. If they don't split you can hope that the defender with 4 s also holds the ♠K and that a squeeze will be possible.

In case the squeeze becomes necessary you should rectify the count, so you win the first trick, pull trumps in two rounds, then give up a trick.

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

 
Deal 8
6♣
OL: K
 
♠ A 2
 
A K 8 6
♣ 10 6 5
  West takes the trick and plays the 9 which you win with your Q.

You now make the key play of taking dummy's ♠A before running three rounds of ♣s.

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

 
Deal 8
6♣
OL: K
 
♠ 2
 
A K 8
♣  
  Unblocking the ♠A to create a Threat out of your ♠Q is the Vienna Coup.

As you see, East was able to find discards on your first three trump leads, but when you play the ♣7 and discard dummy's ♠2 he is squeezed.

He can see that if he discards a dummy will be high, so he will probably throw the ♠K in hopes that his partner holds the ♠Q. But you have that card and you make the slam.

 NEXT 
♠ J 10
Q
2
♣  
♠ K
 
J 10 7
♣  
  ♠ Q
 
5 4
♣ 7
 

 
Deal 8
6♣
OL: K
 
♠ A 2
9 3
A K 8 6
♣ K Q 10 6 5
  As an afterthought to this Deal, let us suppose you were playing 6NT rather than 6♣.

The only difference would be that to rectify the count you would have to hold up once on the opening K.

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