Double Dummy Corner

Competition Problem 24

composed by Jean-Marc Bihl
presented for solving in February, 2007

 DR8 ♠ A5432 ♥ AK52 ♦ Q ♣ AQ4 ♠ 8 ♥ QJ43 ♦ J109 ♣ K9765 ♠ KQ109 ♥ 87 ♦ K7654 ♣ J10 ♠ J76 ♥ 1096 ♦ A832 ♣ 832

Successful solvers:  None.  Several solvers correctly specified West's duck at trick 2 but didn't consider both of the subsequent plays by South that I have described.

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Solution

West must lead a diamond, to the Q, K and A.  South's best try is to lead the 10, but West ducks!  There are now two good tries by declarer that need to be considered.

A.    Ruff a diamond, cash one top heart, and lead a low spade towards the J.  But East wins and returns a spade!

B.    Finesse a club and lead a low trump.  East wins and leads a second club.  North wins and leads a second trump.  East wins and leads a diamond.  North ruffs and South comes to hand on the J to lead the 9.  But West ducks again!

If, in A, East returns a club, North can win two club tricks and advance the K.  East ruffs and returns a diamond but North ruffs that and can now cash A and lead a heart to make two more tricks by ruffing, East trumping a loser at trick 13.

If West covers the first heart, North wins and leads a low spade.  East wins and returns a diamond, ruffed by North, who leads another low spade.  East wins again and this time returns the suit to South's J.  The 9 is allowed to hold but North wins two clubs and the A to catch West in a triple squeeze.  A similar triple squeeze arises against other defences, such as a club opening lead.

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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