Double Dummy Corner

 

Competition Problem 129a

composed by Paolo Treossi
(presented for solving in November, 2015)

DR6

♠ AK1032

 543

 A107

♣ 54

♠ Q654

 K6

 Q954

♣ J109

♠ 987

 J10987

 32

♣ A32

♠ J

 AQ2

 KJ86

♣ KQ876

South is in six no-trumps.
(a) South to make the contract when West leads a low diamond.
(b) What lead defeats the contract, and how?                             

Successful solvers:  Steve Bloom, Ian Budden, Wing-Kai Hon, Leigh Matheson, Radu Mihai, Sebastian Nowacki, A.V. Ramana Rao        Tables

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Solution

(a)      North wins with the 7 and plays a cub to South’s Q.  The J is allowed to hold (best) and is followed by a diamond finesse, the A and K, on which South discards the 2 and Q.  Then North plays another club.  East might as well rise with the A and play a heart, but the run of the remaining clubs then subjects West to a jettison squeeze.  Although the K can now be safely discarded, on the last club West must discard either a spade, allowing North to score the A and 10, or a diamond, allowing North to discard the A so that South makes the K and J.

(b)     West must lead a low spade.  Declarer’s best try is to run it to the J and lead a low diamond, but West inserts the 9 to deny North three entries in the suit.  A club to the K is followed by the J (or 8), which holds, and a third diamond to the A, on which East must discard a spade.  It now looks as if West’s diamond sacrifice is in vain, as North can cash the spade winners, South discarding hearts, and put East in with a club.  But no!—East throws the A on the second spade!

East’s play in b) would have pleased the prolific composer Ernest Pawle, many of whose problems feature his favourite tactic, the delayed jettison, where a discard from one suit creates the opportunity later to throw a high card from another, should the need arise.

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