[jim420]

Topic says it all...

This time I'm fully conscious as South, and therefore didn't have the luck to bid the grand slam

How do you approach it? Interference is very heavy. Would you even suspect the possiblity of a slam existing?

Scoring: IMP

W N E S
1♠ 2♦ 2♠ 3♥
3♠ 4♥ P P
P

4♥S+3
Opening lead: ♠K
4.3 IMP to EW

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EDIT: additional scoreboard note - this is an MBC hand. Nobody bid grand. A 6♥xx+1 bidder gets 14.9 IMP, 3 other tables get 6♥+1 and 2 gets 6♥, for 6.0 and 5.4 IMP. If you miss slam, you lose IMP. A sacrifice attempt of 4♠x-3 gives 1.8 IMP to NS.

PS: I truly dunno how one table could possibly waste this as 6♥-1, must have pitched the ♣A on facing a ♠ lead (jk of coz)...but that gave us better IMP...

[FrancesHinden]

The grand is extraordinarily difficult to bid with any confidence.
I would hope to get to a small slam.

On your auction, North is far too good for a 4H bid. 6H is a better evaluation of the power of the hand, though 4S is the obvious call for the time being.

[mike777]

edit. I would x by north and maybe reach small slam but maybe not.

[Fluffy]

opps raise might help south to think of ♥KQ and ♦AK or AQ, but that needs north to bid something else than 4♥.

I would also be very happy if I can reach 6.

[kenrexford]

Ditto.

I'd add that I do not even like the grand slam here. After a spade or trump lead, I'm down to three hearts. I cash both minor Aces, ruff a diamond, back a heart, ruff a diamond, with a spade ruff in there somewhere. If diamonds splint 3-2, I take three more diamonds in dummy (beyond the Ace), resulting in three spade pitches, and the one spade ruff. That's not enough. So, I need two spade ruffs, meaning that hearts must also split 2-1.

With two voids, I'm not all that keen on playing for diamonds and trumps to both cooperate.

[Codo]

Actually from all bids in the partnership I just liked the final pass.
With North I had prefered X to 2 Diamond but the difference is small.
With south I surely had passed 2 Spade- or I have a tool to show weak long Hearts now. But I doubt, that this is a lebensohl stuation for a lot of partnerships.
Back to north I had bid 4 Spade, 6 Heart 5 Spade or even 7 Heart but never ever 4 Heart.

I think you should reach small slam quite often with these kind of hands but grand slam is too far away - and no good bet anyway.