[pilowsky]

I'll give you the bidding and lead with North and South.
Result hidden below - I messed up and went off 2, working it out afterwards.
East passed, I rated my hand as 17 using the Pilowsky calculator. Turns out KR gives it 16.8. So I'm optimistic.
I venture into the ring with a delicate 1♣.
West astonishes me with 2NT 'unusual etc'. My partner; the bewildering North robot bids 3♣ - "competitive raise" 4+♣ yeah right.
East supports West - at least one of the robots is facing in the right direction.
I decide to show partner what I'm made of; 3S "5+♣;4+♠; 21-HCP; 19-22 total points" This bid is about 80% true - pretty good.
West puts up the white flag. North goes for broke 4NT. 5♥: 100% true.
6♣ by North. And West BANGS down his A♦: can you make it?

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here's the whole hand

Spoiler

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Just a suggestion - don't play it the way I did the first time.

[johnu]

Spoiler

West should be 5-5 or better in hearts and diamonds. If you ruff 2 diamonds, you isolate West's long diamond(s). So draw trump, ruff 2 spade losers in dummy, ruff 2 diamonds, and West will be positionally squeezed on the last trump. With 2 cards to go, West has to keep ♥KJ and ♦J, so must either set up dummy's last diamond, or discard down to a singleton ♥K.

[pilowsky]

johnu, on 2020-September-17, 22:48, said:

Spoiler

West should be 5-5 or better in hearts and diamonds. If you ruff 2 diamonds, you isolate West's long diamond(s). So draw trump, ruff 2 spade losers in dummy, ruff 2 diamonds, and West will be positionally squeezed on the last trump. With 2 cards to go, West has to keep ♥KJ and ♦J, so must either set up dummy's last diamond, or discard down to a singleton ♥K.

Thanks! took me a while - again...

[uhhlv]

You must be careful if west plays another ♦ at the second trick.
After ruffing it and drawing all of the trumps you can only get back into the hand by ruffing 2 more ♦. In this case you don´t have any ♦ left for the squeeze.
So what you have to do is to draw only 1 round of trumps with the king. Then 3 rounds of ♠ and ruffing it on north. Then draw the last trump, ruff a ♠, ruff a diamond, play all of the ♣.

You can only win if west has the ♥K and exactly 1 ♣.