Double Dummy Corner

 

Competition Problem 36

composed by Hugh Darwen

presented for solving in February, 2008

DR5

♠ 1098

 432

 AQ5

♣ QJ32

♠ 5432

 10987

 K7

♣ 987

♠ KJ6

 AQ6

 J10986

♣ K6

♠ AQ7

 KJ5

 432

♣ A1054

South to make four spades against any black suit lead by West.

Successful solvers:  Steve Bloom, Ian Budden, Vincent Labbé, Rajeswar Tewari, Daniel de Lind van Wijngaarden, Dick Yuen, Wim van der Zijden.

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Solution

A.      If West leads a spade, East covers and South wins.  South must lead a diamond, allowing West's K (best) to hold!  Whatever West now returns, North-South make, in some appropriate order a diamond, two more spades, possibly a heart, and three clubs.  Now the fourth club is led, forcing West to ruff and play hearts.  East cannot make more than one heart trick.

For example, If West continues diamonds at trick 3, North wins and leads a spade, covered by East and South.  A third spade is followed by four rounds of clubs.  If West instead leads a heart, South wins as cheaply as possible and crosses on a diamond to North, who can lead either black suit to achieve a similar effect.

B.      If West leads a club, North plays high.  East covers (best) and South wins.  North is entered on a second club to lead a heart.  East plays low (best) and South wins.  South advances the ♣10.

1.       If East discards a diamond, North is entered on a diamond and the contract can now easily be made by leading a heart.  (It can also be made by leading a spade.)

2.       If East ruffs, declarer can contrive to win, in some appropriate order, two hearts, two spades, and two diamonds.  East makes the A at some stage in the process.  East is put on play at trick 10 with a third diamond so that North and South make their remaining trumps separately while West underruffs.  If West tries to spoil this by ruffing the third diamond and leading a trump, the last trick is won in clubs.

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, 2007

Date last modified: 11 March, 2017