Deal 5
 
  6NT
OL: 9
♠ K 7 4
A J 10
Q J 4
♣ Q J 10 7
 
 WEST  NORTH  EAST  SOUTH
2NT
pass6NTpasspass
pass

You are East. The bidding has been as shown.

Partner led the 9, taken by dummy's 10.
The ♠4 is then played from dummy.
Do you play low? or split your honors?

When you have made your choice click NEXT .

9

♠ Q J 6 2
6 5 3
9 7 2
♣ 5 4 3
 
4

 

 
Deal 5
 
  6NT
OL: 9
♠ K 7 4
A J 10
Q J 4
♣ Q J 10 7
  Play the ♠J (or ♠Q).

You should always make a point count check as soon as you see dummy.
South's 2NT promises 20 or 21 points, North has 14 and you have 3; total = 37 or 38.
Therefore West must have either 2 or 3 points. He cannot have two Jacks because you can see all four of them. Likewise he cannot have a Queen because you can see three of them and his lead (top of nothing) denied that Queen.

It follows that West MUST have a King, and it must be ♣s or s since he has denied any Honor.

Since West will definitely win his King, you need to take one trick yourself, and the best way to do that is to split your Honors to establish one ♠ winner.

South has no defense to this, but if you had played low he would have played the ♠10 and made the slam.

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