# Logical Thinking

Dlr:
East
Vul
Both
North
♠ K 9 6 5
A 9 2
J 10 4
♣ Q J 4
South
♠ A Q J 10 3
K J 4
8 6
♣ K 10 2
 West North East South 1♦ 1♠ Pass 2♦ Pass 3♣ Pass 4♠ All Pass

As is the modern style, West led a third- (or fifth-) highest 2. East wins the Q and continues with the ace and king of the suit. You ruff with the ♠10 and draw three rounds of trumps. So far, so good. How do you plan to get to 10 tricks from here?

## Solution

After ruffing the diamond and playing three rounds of trumps, declarer played a club to dummy’s queen, East winning with the ace and exiting with a low club to dummy’s jack. Declarer then played a club to his king, noting that East had at least three clubs. As East/West were playing five-card majors with a 15-17 1NT opener, declarer inferred that East could not have the Q if he had started with a balanced hand. If East had an unbalanced hand, then, of necessity, he would have started with 3=1=5=4 shape. With that in mind, declarer decided that there was no point in playing a heart to the ace and finessing the jack on the way back. If the contract were to succeed in the former case, declarer needed East to have a doubleton 10. In the latter case, he could make 10 tricks only if East started with a singleton queen or ten in the suit. So, declarer cashed the K and advanced the J. After West played low, declarer played the 9 from dummy and the J won the trick, pinning East’s doubleton 10. The full deal:

Dlr:
East
Vul:
Both
North
♠ K 9 6 5
A 9 2
J 10 4
♣ Q J 4
West
♠ 4
Q 8 7 6 5
9 3 2
♣ 9 8 6 5
East
♠ 8 7 2
10 3
A K Q 7 5
♣ A 7 3
South
♠ A Q J 10 3
K J 4
8 6
♣ K 10 2