Double Dummy Corner

 

Competition Problem 145b

composed by Steve Bloom
presented for solving in March 2017

DR2

♠ AQ10

 A1087

 Qx2

♣ A102

♠ KJ

 9

 9x3

♣ 9876543

♠ 987

 QJ65

 KJ10x

♣ KQ

♠ 65432

 K432

 A87

♣ J

The contract is six spades by South.  West leads the ♣9.
The x's represent the 4, 5, and 6.                              
(a) South is to make the slam when North holds the 6.   
(b) What happens in the other four cases?                       

Successful solvers:  Ian Budden, Johnson, Radu Mihai, Sebastian Nowacki, A.V. Ramana Rao, Zoran Sibinović, F.Y. Sing, Rajeswar Tewari, Andries van der Vegt, Dick Yuen, Wim van der Zijden  Tables

Promotions: With this result Steve Bloom becomes a Grand Master Problemist and F.Y. Sing becomes an Expert Problemist.

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Solution

(a) Assume this is the layout:

♠ AQ10

 A1087

 Q62

♣ A102

♠ KJ

 9

 953

♣ 9876543

♠ 987

 QJ65

 KJ104

♣ KQ

♠ 65432

 K432

 A87

♣ J

After the A and the 2 ruffed, declarer finesses and draws trumps, then discards a diamond, as does East, on the good 10.  North now leads the 10, covered by the J and K, then discards the 7 on South’s last spade.  East is squeezed.  Discarding the Q or K is useless, so East throws a lower red card.  Declarer plays ace and another of the suited discarded.  Again it is useless for East to drop an honour under the ace (thanks to North’s 6!), so that player is endplayed at trick 11.  Declarer gets two tricks in the suit now led, plus the established winner in the other red suit.

(b) If North has the 5 and West the 4, then the play in (a) still works.  However, the defence prevails in this layout:

♠ AQ10

 A1087

 Q52

♣ A102

♠ KJ

 9

 963

♣ 9876543

♠ 987

 QJ65

 KJ104

♣ KQ

♠ 65432

 K432

 A87

♣ J

East discards the 10 on the 10, another diamond honour on the 6, and drops the remaining honour under the A.  West then covers the 8 to complete the defence.  The same result arises in the two cases North has the 4.

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, 2017
Date last modified: 10 April, 2017