[lamford]

mr1303, on 2011-February-18, 19:19, said:

Just breaking up this flame war to suggest that 4C & 4D would also be super-accepts suggesting first round controls. We would not normally bid 3nt here as it is undiscussed.

I agree, which is why I gave an example without a first round minor-suit control: AKQx AKJx xx KQx. And if 3S were non-forcing, I would still expect something like this - partner probably thinks 3S is forcing, and is making a super-accept in case it is.

[AlexJonson]

OK guys.

I wanted to investigate what happens when South doesn't have UI from lack of alert.

But if the interest is that North has not just forgetten a transfer, but a whole lump of system, then fine I'll lose interest.

[lamford]

AlexJonson, on 2011-February-19, 17:28, said:

OK guys.

I wanted to investigate what happens when South doesn't have UI from lack of alert.

But if the interest is that North has not just forgetten a transfer, but a whole lump of system, then fine I'll lose interest.

I think I understand. If you bid 2NT (or through a multi) - 3S which is a sign-off and partner does not alert and bids 4H, you can of course do as you want. But I would not play partner for a doubleton spade and five hearts. If it goes through the multi, maybe with 2S, showing hearts, in response, and then 3S is not alerted, that could be more complicated.

[campboy]

AlexJonson, on 2011-February-19, 17:28, said:

OK guys.

I wanted to investigate what happens when South doesn't have UI from lack of alert.

But if the interest is that North has not just forgetten a transfer, but a whole lump of system, then fine I'll lose interest.

The problem with this idea is that if 3♠ were natural and non-forcing the meaning of 4♥ would be different since in that case responder has limited his hand and opener can't be trying for a spade slam.