[gszes]

Late to the party as usual ASSUMING I have not totally misread the situation

Spoiler

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Trick 1 club A
trick 2 club J*
trick 3/4/5/6 clubs forcing west to pitch the AKQ7 of diamonds
trick 7/8/9/10 diamonds forcing west to pitch AKQJ of hearts this makes west hand irrelevant and we arrive at the following

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trick 11 east is done on the lead of the dia 2 south pitching the suit opposite whatever east discards

My solution is totally boring compared to Nige1

If you block the club suit you deserve to go down

HAPPY HOLIDAYS and STAY WELL

[smerriman]

gszes, on 2020-December-25, 20:20, said:

Late to the party as usual ASSUMING I have not totally misread the situation

This doesn't satisfy the constraint of E/W only being able to make 7NT on a club lead (they make it on all leads).

[lamford]

smerriman, on 2020-December-25, 21:41, said:

This doesn't satisfy the constraint of E/W only being able to make 7NT on a club lead (they make it on all leads).

To be fair, I had removed the condition in the rubric, but have now reinstated it and restored the previous layout. Also, the penultimate version was cooked similarly by West having AKQJxx A AKQx AJ. Now 6NT is cold, but 7NT is beaten by a club lead, taking out the entry to dummy prematurely!

[nige1]

Another construction based on Gszes solution, which satisfies the conditions that EW
- Can make a grand-slam in 3 suits.
- Need a ♣ lead to make 7NT.

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[nige1]

Compared with my earlier suggested formulation of the problem, the OP now has an extra diamond trick, which might make solutions easier.

[lamford]

nige1, on 2020-December-26, 19:53, said:

Compared with my earlier suggested formulation of the problem, the OP now has an extra diamond trick, which might make solutions easier.

I don't think so, nigel. There are only three diamond tricks as the ten can never be cashed.

[Cyberyeti]

Coming next - Lamford's book of triple dummy bridge problems ? Is being triple dummy hopeless better or worse than its double dummy equivalent ?

[lamford]

Cyberyeti, on 2020-December-31, 09:00, said:

Coming next - Lamford's book of triple dummy bridge problems ? Is being triple dummy hopeless better or worse than its double dummy equivalent ?

https://www.blakjak.org/telltale.htm is the only "triple dummy" problem I have composed, and it was not that good. I did have an inferential single dummy backwash squeeze a few years ago. Will have to dig that out.

Single dummy is harder than double-dummy which is harder than triple dummy!