Double Dummy Corner

 

Competition Problem 128b

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

DR6

♠ K1062

 642

 A42

♣ A42

♠ J954

 Q53

 K10

♣ KJ95

♠ Q7

 KJ10987

 QJ

♣ 1076

♠ A83

 A

 987653

♣ Q83

West to lead and East-West to defeat South's contract of five diamonds.

Successful solvers:  Radu Mihai, Sebastian Nowacki, Andries van der Vegt      Tables

Only those three solvers spotted the need to lead the 10 at trick two when declarer lets the ♣K hold (see line B below).  Some solvers tried the K at trick one, but South, takes the next diamond, then plays as in line, using the 4 as entry for a heart ruff.  On the run of the trumps North discards a heart and a club.  West can discard a heart but is squeezed without the count in the black suits on the last trump.

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Solution

To defeat the contract, West must lead the ♣K!

A.      If North wins with the ♣A, declarer then takes the A, leads a high trump to the A, ruffs a heart high, and exits with a second high trump.  Whoever wins must lead a club, West leading the ♣9 or East the ♣7.  South does best to win with the Q, cross on the 3 to the 4, ruff a heart, and play the remaining trumps.  West must reduce to three spades and a club other than the J, while East discards hearts, coming down to Q7, a heart and a club.  Having already lost one trick, declarer can make only two out of the last four, with the A and K.

B.      If North ducks, West must switch to the 10!  Against any non-trump lead declarer can score the A and Q and use North’s minor suit aces as entries to ruff out the hearts.  Now whoever has the top trump is thrown in with it for either a ruff-and-discard or a trick-conceding spade lead.  And if West leads the K at trick 2, then North’s K can serve as the second entry for the heart ruffs and East is thrown in after all the black suit winners have been cashed.

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