Deal 15
 
  3NT
OL: ♠6
♠ 5 4
J 6 2
J 8 5 2
♣ A K Q 2
 
 WEST  NORTH  EAST  SOUTH
1NT
pass3NTpasspass
pass

You are East. The bidding has been as shown.

Partner led the ♠6.
You won the ♠A and returned the ♠9, won by South's ♠Q.

South next played to dummy's ♣A and led the 2.
What do you play?

When you have made your choice click NEXT .
♠ 6 2


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


♣ 3
 

 
Deal 15
 
  3NT
OL: ♠6
♠ 5 4
J 6 2
J 8 5 2
♣ A K Q 2
  Play the A.

Count the points. South's 15-17 plus North's 11 plus your 10 comes to 36-38.
So West has room for an Ace or a King, but no more.

West's second ♠ play was the 2, so it looks like he started with 5 ♠s.
And the fall of South's ♠s looks like he may have 1 ♠ left, very likely the ♠K.

All this means that you should take your A now and return your last ♠ to establish West's suit.
Now West's K will be an entry to the ♠s

If you play low, West will have to take the K now, and although he can play a ♠ to establish the suit, he will not have an entry to be able to cash them.

 Deal 16 
♠ 10 8 7 6 2
10 5 4
K 6
♣ J 9 6
♠ A 9 3
Q 9 8
A 7 3
♣ 10 8 5 4
  ♠ K Q J
A K 7 3
Q 10 9 4
♣ 7 3