Competition Problem 164b
South to make six no-trumps. West leads the ♦6.
Successful solvers: Steve Bloom, Ian Budden, Ed Lawhon, Leigh Matheson, Steve McVea, Sebastian Nowacki, A.V. Ramana Rao, Zoran Sibinović, Rajeswar Tewari, Andries van der Vegt, Dick Yuen
South captures Eastís ♦Q (best) with the ♦A and leads the ♥J, North overtaking with the ♥Q if West ducks, otherwise winning with the ♥A. North leads the ♣Q, which is allowed to hold, followed by the ♦5, which East must duck. Winning with the ♦10, South cashes the ♣A and enters North on a heart. East can discard a spade. North now runs the clubs to squeeze both opponents. East and South both discard a spade and a diamond on the first two and West discards a heart, leaving this:
On the last club, if East discards
A. a diamond, South and West both discard spades. South comes to hand on a spade to give up a diamond and win the last two tricks.
B. a spade, South discards a diamond and West is squeezed out of a heart. Southís last diamond goes on a heart lost to West, who either lets North in on the ♠J to make the established heart winners or leads the ♠Q to let South score the ♠K, ♠A, and ♠5.
See the solution to Competition Problem #4 for the recommended tabular format if you prefer not to write in English prose.
Hugh Darwen, 2018