Deal 16
 
  6♠
OL: ♣Q
♠ K Q 8 6
K 7 5 3
A Q 5
♣ 8 4
 
 WEST  NORTH  EAST  SOUTH
1♠
pass2pass4
pass4♠pass6♠
passpasspass

You are West. The bidding has been as shown.

You lead the ♣Q, East plays low and South wins the ♣A.

South pulls trumps in 2 rounds.
He then takes the K, Q, A, discarding a on the last one.
Next he plays dummy's last ♣ to his ♣K.

Having done all this, South now plays a low from his hand.
What do you play?

When you have made your choice click NEXT .
♠ 9 4
A 2
10 6 4 3
♣ Q J 10 7 5
♠ 5 2

9 8 2
♣ 3 2
  ♠ A 3
6 4
K 7
♣ A K
 

 
Deal 16
 
  6♠
OL: ♣Q
♠ K Q 8 6
K 7 5 3
A Q 5
♣ 8 4
  Play the A.

If you followed what South was doing you will realize that he has eliminated both the s and ♣s from both his hand and dummy. If it isn't clear that he is now out of ♣s, just remember the bidding - he must have had 5 ♠s and 4 s.

Suppose you play low on this (as South hopes you will).
Dummy's K will take the trick, and when another is played you will have to win it with your now bare A. You will then have to play a or a ♣, giving South a ruff and sluff.

But if you take your A now, then exit with your 2, South can win the K but will still have to lose a to East.

 Deal 17 
♠ 9 4
A 2
10 6 4 3
♣ Q J 10 7 5
♠ 5 2
Q J 10
J 9 8 2
♣ 9 6 3 2
  ♠ A J 10 7 3
9 8 6 4
K 7
♣ A K