[arepo24]

Hi.
If partner opens 1H and the op bids 2D, and I have 4H and 13 points, am I still permitted to bid 2NT over the 2D interference?
Thanks

[Vampyr]

arepo24, on 2020-June-13, 18:43, said:

Hi.
If partner opens 1H and the op bids 2D, and I have 4H and 13 points, am I still permitted to bid 2NT over the 2D interference?
Thanks

Don’t ask the forum; ask your partner. If you use do use 2NT as a raise, it will be useful to distinguish which hands will go that route and which will note as use a cue bid.

[Stephen Tu]

2nt is used by some people as a raise in competition, but only by a small minority (at least in the US, don't know how common it is in Europe). I certainly would never assume it was a raise without discussion. For most people, cue bidding the overcalled suit (1H-(2D)-3D) by response to the opening bid is used as the "invitational or better" raise.

2nt without discussion is just natural, inviting 3nt with a stopper but no 3+ fit for partner's major.

If you use 2nt as a raise, it can be used to distinguish 4 cd raises from 3 cards, or GF vs inv, or possibly other things, it's usually not retained as Jacoby 2nt with identical responses to your normal structure, although that's a possibility. The idea is that in competition, defining hands to cope with possible later decisions after possible further preemption by 4th hand is somewhat more important than querying opener's shape for slam bidding, as chances for slam have diminished when an opponent has enough strength to overcall.

[arepo24]

Stephen Tu, on 2020-June-13, 19:13, said:

2nt is used by some people as a raise in competition, but only by a small minority (at least in the US, don't know how common it is in Europe). I certainly would never assume it was a raise without discussion. For most people, cue bidding the overcalled suit (1H-(2D)-3D) by response to the opening bid is used as the "invitational or better" raise.

2nt without discussion is just natural, inviting 3nt with a stopper but no 3+ fit for partner's major.

If you use 2nt as a raise, it can be used to distinguish 4 cd raises from 3 cards, or GF vs inv, or possibly other things, it's usually not retained as Jacoby 2nt with identical responses to your normal structure, although that's a possibility. The idea is that in competition, defining hands to cope with possible later decisions after possible further preemption by 4th hand is somewhat more important than querying opener's shape for slam bidding, as chances for slam have diminished when an opponent has enough strength to overcall.

Larry Cohen's response: "Most tournament players use "JACOBY 2NT" in conjunction with their 5-card major system. After an opening of 1-MAJ, a jump to 2NT is conventional. It promises a GF hand and at least 4-card support. This convention should not be used by a passed hand and should not be used if there is interference by the opponents. I can't warn you enough how important it is when employing any convention to cover this vital issue."

[pescetom]

Stephen Tu, on 2020-June-13, 19:13, said:

2nt is used by some people as a raise in competition, but only by a small minority (at least in the US, don't know how common it is in Europe). I certainly would never assume it was a raise without discussion. For most people, cue bidding the overcalled suit (1H-(2D)-3D) by response to the opening bid is used as the "invitational or better" raise.

In mainland Europe it is quite common that a 2NT response without competition is an invitational raise and that 2NT after competition is an invitational raise with 4-card support (whereas cue-bidding the overcall suit shows 3-card support, thus putting the overcaller on lead if opener prefers to play 3NT).

[barmar]

pescetom, on 2020-June-14, 14:00, said:

In mainland Europe it is quite common that a 2NT response without competition is an invitational raise and that 2NT after competition is an invitational raise with 4-card support (whereas cue-bidding the overcall suit shows 3-card support, thus putting the overcaller on lead if opener prefers to play 3NT).

What do you bid if responder has a hand with no support for partner, stoppers in the opponent's suit, and wants to invite NT?

[Vampyr]

barmar, on 2020-June-15, 09:40, said:

What do you bid if responder has a hand with no support for partner, stoppers in the opponent's suit, and wants to invite NT?

Probably start with double.

My preference is to use 2NT as a raise only if the opponents have bid on the 2-level.

[pescetom]

barmar, on 2020-June-15, 09:40, said:

What do you bid if responder has a hand with no support for partner, stoppers in the opponent's suit, and wants to invite NT?

Vampyr, on 2020-June-15, 10:06, said:

Probably start with double.

As the lady says.
Or bid a third suit and let opener conduct the dance.
It really isn't a problem, in practice.