Double Dummy Corner

 

Competition Problem 125a

composed by Ian Budden 
(presented for solving in July, 2015)

DR5

♠ A543

 A543

 Q843

♣ 7

♠ J1097

 K7

 K765

♣ 1098

♠ K86

 Q10986

 J109

♣ KJ

♠ Q2

 J2

 A2

♣ AQ65432

South to make five clubs.  West leads the 5.

Successful solvers:  Jean-Marc Bihl, Steve Bloom, Wing-Kai Hon, Radu Mihai, Sebastian Nowacki, Zoran Sibinović, Andries van der Vegt, Dick Yuen, Wim van der Zijden.  Suggested DRs ranged from 3 to 6.      Tables

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Solution

On the 5 lead, North plays low and South wins with the A.  South returns the 2.  West must play low to avoid setting up two diamond tricks for North, so North wins with the Q.  South ruffs a diamond, cashes the ♣A, and exits with a low club to Eastís ♣K (or ♣J), North discarding a spade.  East returns the 10 on which South plays the 2.  West also plays low and North wins with the A.  South returns to hand with a diamond ruff and cashes the ♣Q and ♣6.  West discards a spade, North comes down to the ♠A5 and two hearts, and East must keep two hearts and the ♠K8.  South now cashes the last trump.  If West discards:

A.      the K, North discards a heart.  East must retain both spades and the Q, so he discards his low heart but is then thrown in with a heart to lead into the spade tenace.

B.      a spade, North discards the ♠5.  If East discards a heart, declarer leads the J to set up a heart in dummy.  And if East discards a spade, declarer crosses to dummyís ♠A, and exits with a heart to the K, forcing West to lead to the ♠Q.

Traps:

1.       If declarer wins the opening lead with Northís Q, cashes ♣A and A, and exits with a club, then East returns the Q or 10 and the defence will prevail.  Declarerís best attempt on the 10 return is probably to play the J and to duck in dummy when West plays the K, rectifying the count for a major suit squeeze on East.  West must now lead the 7 (and not a tempting spade, or indeed anything else) to break up the squeeze.

2.       If South plays the J on the 10, West covers with the K and best defence will defeat the contract:

(a)     If North ducks the K, West continues by leading the 7 to break up the impending squeeze on East.

(b)     If North wins with the A, declarer continues by ruffing a diamond and cashing two clubs.  East discards a spade and two top hearts.  Then, on the last club, West discards another spade, retaining the 7.  If North discards a heart, East unblocks his last top heart, while if North throws a spade, so does East.  In either case the defenders come to two tricks.

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, 2015
Date last modified: 11 March, 2017