[kgr]

MPs
All Vulnerable

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Your partners 2♣ bid showed a 4c♠ and 5+c♣. Strength similar to a one-level overcall and depending on distribution, 7 to 17 HCP.
Opps: 1♦ was a 4c+♦ ; and 2♥ was non-forcing.
2NT and 3♦ are good raises of ♣ and ♠. Direct raises are preemptive.
You bid?

[TylerE]

4♣ sounds like a standout. I don't think 2♠ buys it and I don't want the opponents to have an easy guess.

[ArtK78]

TylerE, on 2013-August-07, 12:52, said:

4♣ sounds like a standout. I don't think 2♠ buys it and I don't want the opponents to have an easy guess.

All vulnerable. Jumping to the 4 level looks like a good way to go for a number opposite nothing (or opposite very little).

I want a spade lead and I have spade support. I will venture 2♠ but nothing more.

[kgr]

Thank you for the answer. Actual NS hands and bidding:

MPs
All Vulnerable

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Bidding:
- 1♦ was a 4c+♦
- 2♣ bid showed a 4c♠ and 5+c♣. Strength similar to a one-level overcall and depending on distribution, 7 to 17 HCP.
- 2♥ was non-forcing
- 3♣ preemptive (no very clear agreements on this, but I assume that 2NT is still a good ♣-raise and 3♦ would be a good ♠-raise.
South did bid 3♣, planning to show his spade support the next round.
North did bid 5♣, assuming that he would make only 3 tricks in defense.
Comments welcome.

[ArtK78]

4♠ will make against any 3-2 spade break and clubs 2-1.

5♣ requires 2-1 clubs and no spade loser.

I suspect that partner will bid 4♠ over my 2♠ bid if he bid 5♣ on the actual auction.

4♥ is likely to make anytime 4♠ fails, so it is not that bad unless something really ugly happens - like 5-0 spades. Even then you should be able to scramble for 8 tricks in spades.

[MrAce]

TylerE, on 2013-August-07, 12:52, said:

4♣ sounds like a standout. I don't think 2♠ buys it and I don't want the opponents to have an easy guess.

I don't get it. You have a toy which allows you to show 4♠ and 5 ♣, and your pd has 4 card spades and he is not bidding them ? Especially when he decided to play at 4 level ? MP ? And it is stand out huh ?

I mean cmon, it is hard to find secondary 4-4 major fit in normal methods after 2/1 minor over call (at least harder than using the toy OP has) Now that it comes, and we have a 4-4 spade fit, but we fall in love with clubs ?

Is it because this is in forums or are you bidding like that in real life too ? I hope it is the former.

[Fluffy]

Bidding anything but 4♠ is beyond me.