Scoring: IMP
West North East South
Pass 1♠ Pass 2♥
Pass 3♠ Pass 4♣
Pass 4♠ Pass 6NT
Pass Pass Pass
I was West and led the ♣4, Declarer won the Queen and took a winning heart finesse, played two top spades and noted my QJ dropping. At this point, Declarer claimed.
With the blocked club position, and no certain entry to his hand, my partner (a star player from Chile) and I declined.
We watched in pain as the play continued. The position before the last spade is cashed:
Scoring: IMP
Note declarer has STIFFED the ♦K. Declarer has a simple 12 tricks if he just bares the A♥ and knocks out the ♦A (7 spades, 2 hearts, 1 diamond and 2 clubs). With the baring of the ♦K, however, the communication is damaged.
Here's where it gets weird. On the last spade, east is squeezed out of a diamond. South pitched the worthless ♥Q and I feel the pinch. I am also squeezed out of a diamond.
Now when declarer plays the K♣ and a diamond off the board, partner rises and either has to give declarer the entry to his hand to cash the two aces, or to put him on the board to cash the two established diamonds.
A double stepping stone with Grosvenors all over the place.
I just cried.

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