Double Dummy Corner

 

Competition Problem 164a

composed by Stefan Ralescu
presented for solving in November 2018

DR5

♠ 865

 32

 A543

♣ AJ108

♠ Q432

 4

 9876

♣ 7654

♠ A

 KQ1098

 QJ10

♣ KQ93

♠ KJ1097

 AJ765

 K2

♣ 2

South to make four spades.  West leads the 4.

Successful solvers:  Steve Bloom, Sebastian Nowacki, Zoran Sibinović, Rajeswar Tewari

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Solution

South captures Eastís Q with the A, then plays the K, a diamond to the A, and a heart from North.  East does best to play low and West does best to ruff Southís J and lead a trump to the A.  Now East does best to lead a diamond.  South plays a middle spade on Eastís A and another when ruffing the diamond.  The position is now like this:

♠ 86

 none

 5

♣ AJ108

♠ Q4

 none

 9

♣ 7654

♠ none

 KQ10

 none

♣ KQ93

♠ KJ7

 765

 none

♣ 2

South leads a heart.

A.      If West discards a club, North ruffs and South ruffs the 5.  On the next heart West does best to ruff with the Q and lead a trump but South wins and plays the last trump, squeezing East in hearts and clubs.

B.      If West discards the 9, North ruffs with the 6 and plays A and another club, ruffed by South with the J.  Now when West ruffs the next heart with the Q and leads a trump, North can win with the 8 and cash the good diamond.  Southís K wins the last trick.

C.      If West ruffs high and leads a trump, declarer can win in hand, cross-ruff the red suits and squeeze East as in line A.  Alternatively, North can win with the 8 and lead the 5, catching East in a ruffing squeeze.

D.      If West ruffs low, North overruffs and the contract is easily made by cross-ruffing, Westís Q scoring at some stage.

Traps: 

If declarer fails to cash the K at trick two, West ruffs the J and leads a spade to Eastís A.  East returns a heart on which West discards a club.  Declarer is now doomed to lose a side-suit trick as well as a trump.

If declarer leads a low heart at trick two, West discards a diamond (to prevent an easy cross-ruff).  East wins, cashes the A, and leads a diamond.

See the solution to Competition Problem #4 for the recommended tabular format if you prefer not to write in English prose.

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© Hugh Darwen, 2018
Date last modified: 03 December, 2018