Double Dummy Corner

 

Competition Problem 165b

composed by F. Y. Sing
presented for solving in December 2018

DR6

♠ 96

 AKQJ8

 KQ10432

♣ none

♠ K85432

 976

 none

♣ 9876

♠ Q10

 none

 AJ98765

♣ KQ54

♠ AJ7

 105432

 none

♣ AJ1032

(a) South to make six hearts.  West leads the 6.
(b) With the
9 and 8 exchanged, how is the same contract made against a spade lead?

Successful solvers:  Steve Bloom, Ed Lawhon, Sebastian Nowacki, Zoran Sibinović, Rajeswar Tewari, Wim van der Zijden.

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Solution

(a) Declarer plays three round of hearts, ending in hand with the 10.  East discards diamonds on the first two.

A.      If East discards a spade, North ruffs a low club and advances the K.

1.      If East plays the A, South ruffs.  Now East can be thrown in after, A, a club ruff and the A and North gets two diamond tricks.

2.      If East ducks, South discards a spade, comes to hand on the A, and leads a middle club.  East wins but is endplayed.  A club return gives South three club tricks, North discarding a spade, then North gets a spade ruff.  On the other hand, a diamond return gives North a diamond trick on which South’s spade loser goes.  A club ruff sets up an extra trick in that suit and South can return to hand on a ruff to score it.

B.      If East discards a club, it is an easy matter to set up South’s clubs, either ruffing twice in North or ruffing once and conceding a trick in the suit.

C.      If East discards a diamond, North discards a spade on the A and South plays the A and another spade, ruffed by North, who advances the K.  Whether East ducks or covers, South will get the lead on a diamond ruff and advance the J.  East wins but is endplayed in the minor suits and South’s spade loser goes on a diamond winner one way or another.

(b) South captures East’s Q with the A, throws North’s remaining spade on the A, and ruffs a spade high.  North plays the A, K, and 9, catching East in a seesaw squeeze.

D.      If East discards a club, South overtakes with the 10 and North ruffs a club to lead the K.  East does best to duck (otherwise declarer has a surfeit of tricks by ruffing and throwing East in with a club) but South discards the spade loser, ruffs a diamond to hand and gives up a club.  South’s remaining trump and two established club winners takes the last three tricks.

E.      If East discards a diamond, the 9 holds and North advances the K, ruffing if East covers, otherwise discarding a spade and ruffing the next diamond.  In either case South then leads the J to endplay East.  Either a diamond ruff, a club ruff and North’s remaining diamonds take the rest or a club ruff, a diamond ruff and South’s remaining clubs do so, the spade loser going on a diamond winner at some stage.

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, 2018
Date last modified: 21 January, 2019