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.