What is the rebid?

[ONEferBRID]

I've been told that "anything" is better than plain vanilla Jac2NT.

 

I favor Swedish2NT, but usually have to rely on Jac2NT with most.

 

A few comparisons:

Jac2NT is GF.

 

With Swedish,

Responder has 4 +, limit raise or better; so you can stop in 3M.

 

When Opener has a minimum, his rebid is:

Jacoby                    Swedish

4M ( no shortness)    3C! ( any minimum); 3D! then asks if shortness anywhere.

 

Jacoby: Opener shows shortness with ANY hand.

Swedish: direct shortness is shown ( over 2NT!) ONLY w/"extras";

otherwise indirect shortness is shown w/minimum hands only if subsequently asked for.

[Bbradley62]

standard, simplest and worst system is

 

3x singleton

3M max

3N medium

4x 55

4M min

These are standard responses to Jacoby 2NT. According to BBO's SAYC convention card, those are defined as:

3M=18+ HCP, no singleton or void

3NT=15-17 HCP, no singleton or void

4M = 12-14 HCP, no singleton or void

I think this isn't as useful as it could/should be.

 

I learned those descriptions (a couple of decades ago) as:

3M=would have invited or forced game over 1M-2M

3N=would have passed 1M-2M or bid 4M over 1M-3M

4M=would have passed a limit raise 1M-3M

These descriptions allow for a useful trade-off between HCP, extra trump length and other intangibles.

 

The point of this convention to (somewhat) quickly (and simply) determine whether slam is a possibility. If one of these is opener's rebid, responder should have a good idea now. If opener would have bid 1M-2M-4M and responder has a minimum for his 2N bid, it's possible that the auction will go 1M-2N-3M-4M-4N, which sounds strange, but it's still straight-forward.

 

The advantages are that it straight-forward and sufficiently standard that it requires almost no up-front conversation by pickup partnerships. Regular partnerships can easily modify it to their liking.

[aguahombre]

Y'all have convinced me. No J2n in casual partnership, and not with any Swedes. Plus I don't think I will give up compartmentalized bids of 2/1 to fit it in

[fromageGB]

Ok, so in a J2N auction, is there ever a time when Responder relinquishes captaincy back to the opening bidder, having in any way described his(responder's) holding?

The way I play this, yes.

Our structure is a simple 1♠ 2NT ?

    3♣ = I don't have a shortage, do you?

    higher bids = show shortage

After 3♣ responder makes the same bids as opener to show his shortage if he has one.

If responder has no shortage either he can ask/describe strength.

 

If either party shows a shortage the other can then sign off or make further asks. So there is no concept of captaincy, as it is a mirrored situation. For us responder does not have to have a balanced hand. Our splinters are never more than minimum opening strength, so J2N is made with any 13+.

 

If responder has a shortage, opener is the captain. If opener has a shortage, then although the "wrong hand" is disclosed, I think it is better than not being in the correct contract. I suppose you could modify it so that if it is opener that has a shortage, responder then tells his features/values rather than ask opener's. A minimum (after devaluing holdings in the shortage suit) would sign off anyway.

 

(Note - to make a symmetric system, we play 1♥ 2♠ as the J2N)