[Oceanss]

Hi

Playing IMPs, if auction goes:
(1♦) 1♠ (2♦) ?

having in mind that 2S would be relatively weak hand with spade support, what's the difference between 3D and 3S answers?
Could it be LTT (3S would show 4+ support?)

Specifically, holding Axxx Kxx xx QJxx what would you bid, and how vulnerability may influence your bid?

Thanks : )

[helene_t]

3♠ is preemptive so with your hand you should bid 3♦.

[Zelandakh]

This is a slightly tricky question to answer because it depends on far along you are. The traditional way for intermediates to play is for 3♦ to be a good raise and for 3♠ to be a weak raise with extra spade length. However, most beginners are taught that 3♠ is an invitational raise here. If this is your understanding then 3♦ is just played as a general game force and does not promise spade support.

[fromageGB]

Answering a bit more of your question, I would say that, 3♠ shows 4 card support but is not invitational. It is weaker than that. A absolute beginner might play 3♠ invitational, but 3♦ is much better, as it is an otherwise unwanted bid. This then frees the 3♠ to be pre-emptive, so would be 4 card (LTT).

Without discussion, 3♦ may be 3 or 4 card support - I don't know what is taught. If you think the sequence (1♦) 1♠ (2♦) 2NT is natural and invitational, then leave it at that. However, 1♠ is rather undefined in strength, and 2NT is rarely a good place to play when they have an obvious supported suit to lead. If 2NT is therefore a spare bid, then to extend the LTT concept you can use both 2NT and 3♦ as spade support game invitational hands, one to show 3 card support and the other to show 4 card support. (The former would need to be stronger in terms of hcp.)

Your specific hand is a 3♦ bid for me, and I would not make any change for vulnerability or scoring method.