[gwnn]

1S-2H-3H-p
3NT-p

3H was mistakenly explained as a stop ask when it is a limit raise+. What does the UI suggest?

[barmar]

I think it suggests that opener could have a minimum. Without the UI, you'd expect opener to have extra values, since he's accepting the game invitation. The UI has little effect on expectations about ♥ stoppers, it shows a stopper in both cases (but maybe without the UI you'd expect a double stopper, since he offered 3NT himself).

[mycroft]

For my partnerships, that partner has a heart stopper instead of the "minimal slam try" that would be bidding Frivolous 3NT.

Others would be different I would guess; there would be those who would never bid 3NT after 1M-limit raise, or those who mean it as "choice of games" at matchpoints, or...

[gnasher]

If responder thinks that 3NT is systemically natural, the UI suggests bidding 4♥ rather than passing.

If responder thinks that 3NT is systemically a slam try with hearts agreed, the UI suggests signing off rather than cue-bidding.

[gwnn]

mycroft, on 2012-January-11, 14:50, said:

Others would be different I would guess; there would be those who would never bid 3NT after 1M-limit raise, or those who mean it as "choice of games" at matchpoints, or...

That is the case in this partnership.

[mycroft]

well, then the UI says "hey, partner, I got a heart stopper" but it also says "I don't realize you have a spade fit".

Having said that, the AI says "partner, I got a heart stopper". So, I think if 4♠ will play better than 3NT with the hand that the LR has - or it "looks like" it will - then we allow 4♠. The problem with this is that the TD is going to have to determine on what hands "this pair" or "this class of pair" will sit for 3NT choice of games, and that's *very tough* if you don't know them.

For instance, I will almost never do it, especially with a potential ruff or an xxx suit; another player at my club would do it at least 1 time in 3, maybe 1 in 2.

[Cyberyeti]

4 or 5 card majors ? Strong or weak no trump ? Need more information.

In the 4 card major auction, this could still be a 4-3 fit with a strong no trump hand held by opener.

[blackshoe]

What are responder's logical alternatives? Could one demonstrably be suggested over another?

[gwnn]

blackshoe, on 2012-January-13, 11:58, said:

What are responder's logical alternatives?

pass and 4♠. (I should have included this in the opening post I guess - sorry!)

blackshoe, on 2012-January-13, 11:58, said:

Could one demonstrably be suggested over another?

This was the question from the opening post. I intentionally did not include a hand.

Cyberyeti said:

4 or 5 card majors ? Strong or weak no trump ? Need more information.

5 card majors, strong NT.

[FrancesHinden]

gwnn, on 2012-January-11, 14:39, said:

1S-2H-3H-p
3NT-p

3H was mistakenly explained as a stop ask when it is a limit raise+. What does the UI suggest?

The UI suggests bidding 4S because partner doesn't know we have a spade fit.
It's possible that responder has no LA to 4S, of course.

[lamford]

gnasher, on 2012-January-11, 16:17, said:

If responder thinks that 3NT is systemically natural, the UI suggests bidding 4♥ rather than passing.

I don't think the UI suggests bidding 4♥. East's hand might suggest that however - heart void and good trumps, perhaps

[gnasher]

lamford, on 2012-January-14, 06:52, said:

I don't think the UI suggests bidding 4♥. East's hand might suggest that however - heart void and good trumps, perhaps

I meant 4♠, sorry. Or, more generally, it suggests bidding anything that implies spade support over anything that doesn't.