[Antrax]

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Random bot play so IMPs, unfavourable.

GIB doesn't adjust for vulnerability when preempting so you know it has the ♦A and a major card or more.

I was planning to post this hand in GIB robot discussion to complain about the bidding system, where X is takeout, 4♦ and 5♦ show two-suited hands with 4 and 3- losers respectively, 3NT is capped at 22 HCP and 4NT is undefined, but then I realized my own system has no real answer here, either.

So, what do you do with this hand? I realize you normally don't tailor your system to these extreme situations, I just wonder which general agreements might work here.
As a bonus question, what if you also held the ♠A? Do you just blast 6NT and hope for a dummy entry or a diamond lead?

[Hanoi5]

3NT, hoping they don't run spades.

[broze]

3NT is completely obvious to me, no matter how many gadgets and knick-knacks I've got. I would not use a natural 4N even if I had it available.

[Antrax]

Oh wow, I'm way too optimistic.

So what happens here?

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[nigel_k]

I would double with the first hand. If partner can only bid three of a major, 3NT is enough. Otherwise I will bid slam. Not perfect, but I expect to reach more good slams than bad ones compared to just bidding 3NT.

[Antrax]

What's the plan after X-(p)-4♠? It's GIB so you won't be able to play NT below 6.

[P_Marlowe]

First hand.

X followed by 3NT.

You are so strong, that partner wont jump to 4M.

If he still jumps, you know, ..., I guess I bid 6NT.

Would be a lot harder, if you swap diamonds with spades, and you face a 3S preempt.

With kind regards
Marlowe

[HighLow21]

Hand 1: 3NT. Less than 22 HCP in my book because of the short secondary honors in ♦ and ♠.

Hand 2: TOUGH. It depends on how lucky i'm feeling. Partner needs specific cards for a slam to be on in most cases. I would guess it no better than 50/50 to make slam on average. I'd probably double then go 4♥ if partner bids them or 3NT if not. And I'd grit my teeth if he showed up with something like xxxx♠ K9xxx♥ xxxx♣.