Deal 7
 
 
 
♠ A K J
K 7 3
A 6 5 2
♣ 8 6 4
 
 WEST  NORTH  EAST  SOUTH
1NT2
pass4passpass
pass

South is to play 4. West leads the ♣J.
East wins ♣ A K Q then switches to a trump.

Make a Plan, then click NEXT .
   
  ♠ 8 7
A Q 9 8 6 2
Q 7
♣ 7 5 2
 

 
Deal 7
4
OL: ♣J
 
♠ A K J
K 7 3
A 6 5 2
♣ 8 6 4
  East takes ♣ A K Q then switches to a trump.

You must win the next 10 tricks but you only have 9 winners.

East opened 1NT, showing 15-17 points, and West has already produced 2 Jacks.
So both the ♠Q and K are with East and you will have to put the squeeze on him.

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

 
Deal 7
4
OL: ♣J
 
♠ A K J
7 3
A 6 5 2
♣  
  You are in dummy, having won their trump exit with the K.

Since you need all the tricks the count is already rectified.

You plan to squeeze East by running the long s in your hand, but the problem is that the Q is not a Threat card yet. To make it a Threat you need to unblock dummy's A. So play the A, then pull trumps with the A Q.

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

 
Deal 7
4
OL: ♣J
 
♠ A K J
 
6 5 2
♣  
  Unblocking the A to make your Q a squeeze Threat is called the Vienna Coup.

With 6 cards left to be played you are ready to apply pressure to East.

Play the 9 8, discarding s from dummy. East is not troubled yet, he can discard the J and the ♠3.

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

 
Deal 7
4
OL: ♣J
 
♠ A K J
 
6
♣  
  East is now looking a little nervous, like he has a big target on his back!

Play the 6 and throw dummy's 6.

East can choose his fate. If he throws the ♠9 you will know that his ♠Q will drop since his third card MUST be the K. So you would just play to the high ♠s and the ♠J would be good.

Or, he can throw his K which makes your Q a winner.

 NEXT 
♠ 6 5
 
9 8
♣  
♠ Q 10 9
 
K
♣  
  ♠ 8 7
6
Q
♣  
 

 
Deal 7
4
OL: ♣J
 
♠ A K J
 
A 6
♣  
  That worked great, right?
Let's back up and pretend you had NOT unblocked the A. We will just add one to everybody's hand and look at the ending.

Now when you play your 6 as a squeeze card you have a problem. You are squeezing dummy, not East.

If you discard the 6 East will throw his J, then sit back and wait for his ♠Q trick.

But if you discard dummy's ♠J instead, East will match that by throwing his ♠9, then sit back and wait for his K trick.

Only by visualizing the ending and using the Vienna Coup can this hand be made.

 Deal 9 
♠ 6 5

9 8 4
♠ Q 10 9

K J
  ♠ 8 7
6
Q 7