Deal 4
 
  3NT
OL: 5
♠ J 8 4
7 6 2
8 4
♣ K J 9 6 5
 
 WEST  NORTH  EAST  SOUTH
2♣
pass2pass2NT
pass3NTpasspass
pass

You are West. The bidding has been as shown.
You led the 5, East wins the Q and returns the 7.
South holds up his A until the third round.
He then plays the ♣Q and it is your play.

When you have made your choice click NEXT .
♠ 7 3
J 8 4 3
K J 9 5 2
♣ 8 2


Q 7 3
 

6 10 A
♣ Q
 

 
Deal 4
 
  3NT
OL: 5
♠ J 8 4
7 6 2
8 4
♣ K J 9 6 5
  Play the ♣8.

You assume (hope) that East holds the ♣A.
If he does then he will need help from you to decide which trick he should win.
You play the ♣8 first, and the ♣2 next to show an even number.

If East is paying attention he will know to win the THIRD ♣.
This will kill dummy's ♣ suit, and with it South's chance of making 9 tricks.

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