Double Dummy Corner

 

Problem 320

composed by Wim van der Zijden with Hugh Darwen, 1988

DR7

♠ K87

 J62

 AJ82

♣ Q32

♠ 96

 10987

 Q97654

♣ J




♠ A10543

 Q54

 10

♣ K864

♠ QJ2

 AK3

 K3

♣ A10975

South is in six no-trumps, which cannot be made.
Which exchanges of (a) a red queen with the ten of the suit suit or (b) an eight held by North with the nine of the same suit, allow South to make the contract?  Analyse each of the four cases.

To send me your solution, click here.

Successful solvers to date:  Dick Yuen, Jean-Marc Bihl

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        Hugh Darwen, 2003

Date last modified: 11 March, 2017