[Lord Molyb]

Board 3, same opponents after what seemed to be a fairly flat board 2.

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2♣ is game forcing, 2NT showed 5-5 in the majors, X of 2NT was undiscussed but probably looked like interest in penalty, 3♣ did not have a definition, neither did the double of 3♣, X of 3♥ was penalty, 3♠ was probably preference, and now it's your turn.
Weak (10-13) NT is played by you and your partner, so partner knows you don't have that.
Double again, or..?
4NT is undiscussed.
Do you agree with both doubles?

[Hanoi5]

Mp's, they're red you're white, they don't seem to have a good fit, you have good defensive values? aXe it!

[MrAce]

Wack em.

[mr1303]

Clear double. I lead a trump. Not sure whether the ace or a small one is better, probably go with a small one.

[nige1]

Lord Molyb writes "Board 3, same opponents after what seemed to be a fairly flat board 2. 2♣ is game forcing, 2NT showed 5-5 in the majors, X of 2NT was undiscussed but probably looked like interest in penalty, 3♣ did not have a definition, neither did the double of 3♣, X of 3♥ was penalty, 3♠ was probably preference, and now it's your turn. Weak (10-13) NT is played by you and your partner, so partner knows you don't have that. Double again, or..? 4NT is undiscussed. Do you agree with both doubles?"

IMO
Agree with Lord Molyb's doubles.
LHO's 3♣ should be natural (XX = no preference, you choose, 3m = natural, 3M = preference)
The meaning of partner's double depends on the meaning of 3♣. But it should show interest in penalties.
Now Double = 10, 3N = 6, 4N = 4. And I like mr1303's small trump lead.

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[Fluffy]

double!!!

[Codo]

Low spade to produce the doubled undertricks..

I may miss a slam, but such is life.

[gszes]

I wonder which is stronger if p passed 3c or if p x 3c. IMO p will pass
with nothing extra (no need to reassure p they had a 2c bid). If p is showing
extra values (extra good clubs) it seems counter intuitive to seek a penalty here
when we should be strongly considering if 7 is right or not. The hand will
probably break poorly (I suspect rho has a very distributional hand). the 3c bid
might merely have been "bridge" something to mess with the opps mind
as it makes no sense as natural.

The real question is how do we proceed if we pursue slam vs the red flag
in front of a bull penalty x?????????

I would bid 4d p either has exceptional clubs or has dia support and p knows
we must have extra values also else we would x 3s if no slam interest.

if p can throw in a cue bid we might still be able to bid 7 if not we can settle
for trying 6c and giving p a choice of slams. It is possible rho has zero sense of
the vulnerability but I think it highly likely they realize it and are hugely distributional.

[Free]

Dbl

[rmnka447]

Double. I don't see much other choice.