Double Dummy Corner

 

Competition Problem 132b

composed by Tim Bourke and Hugh Darwen
presented for solving in February 2016

DR3

♠ 5

 J106

 AK432

♣ AQ83

♠ QJ10

 5432

 QJ10

♣ KJ4

♠ 9876

 K98

 9876

♣ 65

♠ AK432

 AQ7

 5

♣ 10972

South is declarer in six no-trumps.  How is the contract made when West chooses the wrong queen for the opening lead?

Successful solvers:  Steve Bloom, Ian Budden, Leigh Matheson, Radu Mihai, A.V. Ramana Rao, Zoran Sibinović, F.Y. Sing, Andries van der Vegt, Dick Yuen, Wim van der Zijden.      Tables

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Solution

West chooses the Q.  South wins and leads the 10.  West does best to cover this and North wins, finessing.  North leads the J.  East does best not to cover this but South wins with the Q anyway.  South’s next lead is the 7.  West plays the 4 and North overtakes with the 8.  The A now starts a progressive seesaw squeeze on East in this position:

♠ none

 106

 AK432

♣ A3

♠ J10

 543

 QJ10

♣ K

♠ 987

 K9

 9876

♣ none

♠ A432

 A7

 5

♣ 92

A.      If East discards a spade, South plays low and comes to hand on the 9 to give up a spade.  South’s heart loser goes on the second top diamond and then declarer comes to hand on the A to score the established spade winners.

B.      If East discards a diamond, South drops the 9 and North gives up a diamond trick.  After a heart return to South’s A, North’s heart loser goes on the top spade and the 3 affords entry to the good diamonds.

C.      If East discards a heart, South again drops the 9 but now North cashes the 3 to continue the squeeze.

1.       A spade discard allows the spades to be established with 10 as entry.

2.       A diamond discard allows the diamonds to be established with the A as entry.

3.       Discarding the K allows North to exert a second seesaw squeeze by leading the 6, South playing the 7 if East throws a spade, otherwise the A.

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