Double Dummy Corner

Competition Problem 143b

by Steve Bloom after Hugh Darwen
presented for solving in January 2017

 DR2 ♠ Q32 ♥ A32 ♦ 9432 ♣ 432 ♠ K ♥ QJ109 ♦ K8765 ♣ K87 ♠ J109 ♥ K8765 ♦ J10 ♣ J109 ♠ A87654 ♥ 4 ♦ AQ ♣ AQ65

Successful solvers: Ian Budden, Leigh Matheson, Radu Mihai, Sebastian Nowacki, Zoran Sibinović, Rajeswar Tewari, Andries van der Vegt, Dick Yuen, Wim van der Zijden  Tables

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Solution

I hoped nobody would notice this problem's resemblance to Competition Problem 118b, from December 2014, but at least two solvers did.  Apologies to them.

After the A at trick one South must immediately ruff a heart and then lose a spade to West’s K.  South ruffs the heart return, cashes the A (optionally—this can be done later) and advances the Q.  Assuming West wins with the K and returns a diamond, the following ending is reached with South on lead:

 ♠ Q ♥ none ♦ 94 ♣ 432 ♠ none ♥ 10 ♦ 87 ♣ K87 ♠ J ♥ K8 ♦ none ♣ J109 ♠ 87 ♥ none ♦ none ♣ AQ65

A spade to the Q wrings the 10 from West (if a club, then A and another establishes the suit), whereupon 9 and another diamond throws that player in for a lead away from the K.

Note: If West returns a heart instead of a diamond, this must be ruffed by South, not North.

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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