[fromageGB]

Following up on AWM's poll, which suit do you use as checkback and why?

In the sequence 1♣ 1♥ 2NT (opponents silent), 3♣ as checkback (for whatever major holdings you use this for) allows a responder rebid of 3♦ to be natural, and using 3♦ as checkback allows 3♣ to be natural. Which is more use?

If 3♣ is checkback, opener with no useful major can rebid 3NT or 3♦. What should the 3♦ mean?

[Lurpoa]

fromageGB, on 2011-May-14, 07:07, said:

Following up on AWM's poll, which suit do you use as checkback and why?

In the sequence 1♣ 1♥ 2NT (opponents silent), 3♣ as checkback (for whatever major holdings you use this for) allows a responder rebid of 3♦ to be natural, and using 3♦ as checkback allows 3♣ to be natural. Which is more use?

If 3♣ is checkback, opener with no useful major can rebid 3NT or 3♦. What should the 3♦ mean?

I play BWS2001; no checkback after a rebid of 2NT.
The same goes if I play SAYC.


Any reason why you absolutely need checkback here ?

Did you take into account the possible disadvantages when agreeing to play checkback ?

Maybe you should change your poll: third option, no checkback. Can you do that ?

[awm]

I believe that the "right" way to play here is transfers.

Barring that, there are two reasonable ways to play. One is where three of the other minor is checkback, and three of opener's minor is a slam try in that suit. This has the problem that you can't get out in three of a suit over opener's 2NT rebid, but otherwise does very well in finding your best strain and looking for slam. The other option is to play 3♣ as a puppet to 3♦ for the purpose of signing off, in which case 3♦ is checkback (always). This lets you get out in 3M or 3♦, but makes it harder to look for slam in opener's minor. Note that in either case, 3♦ is checkback when opener's suit is clubs.

[aguahombre]

Lurpoa, on 2011-May-14, 09:31, said:

I play BWS2001; no checkback after a rebid of 2NT.
The same goes if I play SAYC.


Any reason why you absolutely need checkback here ?

Although you and I don't have the need for checkbacks, there are many who do need them. Why? Any one or more of the following:

1. They respond so light that 2NT doesn't ensure game (Hence, Wolf).
2. They don't have alternate natural agreements to show 5 hearts and choice of games, 6 hearts and slam interest, or 6 hearts and game only.
3. The 2NT rebid doesn't deny 4 spades and responder's 3S rebid is reserved for something other than just showing 4 Spades.
4. The 2NT rebid might not have a (semi) balanced hand at all and might be done with a stiff heart.

[Quantumcat]

Most people I know use transfers over a 2NT rebid. I poted some examples in the other post about checkback over a 2NT rebid.

[Free]

I use 3♣ as some sort of checkback and 3♦ as a slam invite (or stronger) with 4M and a longer minor. I'm pretty happy with it, although I've never tried transfers. Perhaps I should...

[Flameous]

My structure is following:

3♣ always checkback
3♦ natural, if opener has diamonds it shows 4 cards and slammish. If opener has clubs, it's 46+ sort of hand, less than invite.
3M 6+, usually slammish
3oM, clubs similar to 3♦