Double Dummy Corner

 

Competition Problem 137a

composed by Steve Bloom
presented for solving in July 2016

 

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Successful solvers: Ian Budden, Leigh Matheson, Sebastian Nowacki, Radu Mihai, F.Y. Sing, Andries van der Vegt, Wim van der Zijden       Tables

Promotion: Many congratulations to Sebastian Nowacki on achieving the Life Master Problemist norm.

This is a two-in-one problem.  Solvers had to solve both positions.

Position A

DR6

♠ K

 KJ32

 972

♣ A5432

♠ 98765

 none

 1054

♣ J10987

♠ none

 Q109876

 KQJ6

♣ KQ6

♠ AQJ10432

 A54

 A83

♣ none

South to make six spades.  West leads the ♠9.

Solution

North wins the first trick and leads a low club for South to ruff.  South runs the trumps, North discarding two diamonds and three clubs.  East must keep four hearts, leaving only two cards in the minor suits.  If these are

1.      both clubs, declarer can set up a trick by conceding a diamond to Westís 10.

2.      both diamonds, then the A and 3 either throws East in for a heart lead or, if East unblocks to let West win with the 10, sets up a diamond trick as in 1.

3.      a high diamond and any club, North scores the K and A, then throws East in on the K for a heart lead into the split tenace.

4.      a club and the 6, South leads the 3 to establish an extra trick in the suit.

Position B

♠ K

 KJ32

 972

♣ A6432

♠ 98765

 none

 1064

♣ J10987

♠ none

 Q109876

 KQJ5

♣ KQ5

♠ AQJ10432

 A54

 A83

♣ none

South to make six spades.  West leads the ♠9.

Solution

North wins the first trick, cashes the A, South discarding the 3, and leads a low club for South to ruff.  South runs the trumps.  This is the position at trick seven:

♠ none

 KJ32

 97

♣ 6

♠ 8

 none

 1064

♣ J109

♠ none

 Q1098

 K5

♣ 5

♠ 104

 A54

 A8

♣ none

On the 10 North discards the 9!  If East discards

1.       a heart, declarer gives up a heart immediately to set up Northís fourth.

2.       the 5, then the next spade forces a diamond from East, allowing that player to be thrown in with a low heart ducked after the A is cashed.

3.       the 5, North is entered on the K for South to ruff a club and underlead the A to get a heart lead from East into the split tenace.

4.       the K, then North discards a heart on the 4.  The A and K force West down to the 106 and a club.  Thanks to Northís 6 being higher than Eastís that card now effects a throw-in on West (which would fail if Northís remaining diamond were the 9).

Traps: 

In A, if declarer plays as in layout B, cashing the A at trick two, then East discards the K in the position shown.  Then West discards clubs on the last spade and the top hearts such that East's 6 defeats line B.4.

In B, if declarer plays as in layout A, ruffing a low club at trick two, then East comes down to four hearts and K5, defeating line A.2.

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, 2016
Date last modified: 11 March, 2017