[4321]

1♦ - (1♥) - pass - (2♣)
??

We have very strong hand.
We DBL with 4-x-4-x and bid 2♠ with 4-6.
What should we do with 4-5? May be vulnerability deciding that?
Apropos, how strong should be our hand?

[dake50]

Any bid must be very offensive. 2S on 4-5 if willing to play S:4-3
Partner did not negX, so if his hand is useful it doesn't have 4+S.
And willing to play 3D(we will be chased that high) on D5-2:Qx.

I hate these auctions.
Any push I make spotlights missing honors/shape for their 4H play.
I might win a fraction of hands yet, but I pass nearly all.

[FrancesHinden]

I would pass on virtually all 4-4s. Why do I want to get involved if partner couldn't act over 1D?
I would double on 4-5 and often with 4-6. Bidding would frequently be 5-6 but could be a very strong 4-6.

[MrAce]

5-4 "VERY STRONG" also doubles. As well as 6-4 "VERY STRONG" hands.

By the way, i disagree that bidding 2♠ should be "very strong 6-4", bidding 2♠ showing 6-4 or 6-5 is common, Of course this depends on what u guys mean by "very strong"

AQxx xx AKxxxx x This 13 hcp is enough for me to bid 2♠. You basically will be in great shape with pd having ♠ supp and a few help but was not able to neg double. Such as KTxx xxxx xx xxx or JTxx xxxx Qx xxx and i can of course generate hands where he has nothing but only 4 or 5 cards ♠, u cant make or dont have a play in 4♠ but it is a great save vs 4♥. 6-4 hands with very good suits, when find 4-4 or 5-4 fit usually offers a lot of tricks.

Now, to me, a "VERY STRONG" 6-4 hand is like putting another A to the example above or adding ♠K .