Deal 14
 
  4♠
♠ Q J 9 3
K Q J 5
9 3
♣ Q J 10
 
 WEST  NORTH  EAST  SOUTH
1NT
pass2♣pass2♠
pass4♠passpass
pass

The bidding has been as shown.
Partner led the ♣9, dummy played the ♣10 and it is your play.

When you have made your choice click NEXT .



♣ 9
♠ 8 4
9 7 3
10 8 7 2
♣ A 6 5 3
 


 

 
Deal 14
 
  4♠
♠ Q J 9 3
K Q J 5
9 3
♣ Q J 10
  Play the ♣6.

Partner's ♣9 is likely from a short suit.
If it is a singleton, you should take the ♣A immediately and return the suit for a ruff.
If it is a doubleton, you should NOT take your ♣A now, but should hope partner can get the lead and play his second ♣ to your Ace so you can give him the ruff.

You can figure out which it is.

If it is a singleton, then South must hold 5 ♣s.
But you know South has 4 ♠s, so if he also has 5 ♣s then he only has 4 red cards, and he would not have opened 1NT with either 5-4-2-2 or 5-4-3-1 distribution.

So partner's ♣9 is not a singleton, and you should wait.
Declarer then runs dummy's ♠Q.
Partner wins the ♠K, returns his OTHER ♣ to your ♣A, and NOW you give him the ruff. He takes the A for down 1.

 Deal 15 
♠ K 6 2
10 6 4
A J 6 5 4
♣ 9 2
♠ 8 4
9 7 3
10 8 7 2
♣ A 6 5 3
  ♠ A 10 7 5
A 8 2
K Q
♣ K 8 7 4