Deal 6
 
  3NT
OL: ♠10
♠ K J 5
Q 7 4
10 7 2
♣ A J 9 5
 
 WEST  NORTH  EAST  SOUTH
1NT
pass3NTpasspass
pass

You are West. The bidding has been as shown.

You lead the ♠10; low cards from North and East, won by South with the ♠A.

South next plays the ♣3 and you must decide whether to split your ♣ K Q.

When you have made your choice click NEXT .
♠ 10 9 8 2
9 6 3 2
5 3
♣ K Q 4
♠ 3


  ♠ A


♣ 3
 

 
Deal 6
 
  3NT
OL: ♠10
♠ K J 5
Q 7 4
10 7 2
♣ A J 9 5
  Play the ♣4.

If you split your Honors, playing the ♣Q perhaps, dummy's ♣A will take the trick and South will later play through your ♣K toward dummy's ♣ J 9 5. Played in this way he will establish 3 ♣ winners (which he needs for the contract).

If you play low, he MIGHT finesse the ♣J and again establish 3 ♣ winners.
But South's correct play would be to put on dummy's ♣9, finessing West for the ♣10.
This is because ♣ K 10 or ♣ Q 10 are twice as likely as ♣ K Q.

If he does play this way East will win the ♣10 and your ♣ K Q will get one more trick.

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