[jh51]

This came up in a club game (live, not BBO) recently with a pick up parnter I had met 15 minutes before game time, so not a lot of time dor discussion. Her card had Checkback Stayman indicated, which I gladly agreed to play.

Partner dealt and the bidding went:
1C-(P)-1S-(2D)
2NT-(P)-?

I was not sure whether 3C would be checkback after opponent's interfrerence, but I bid it anyway. Partner admitted that she had forgotten about checkback stayman after everyone passed and I explained to the opponents that there may have been a failure to alert. So the question remained unresolved in my mind as to whether checkback does or should apply.

What do you folks think about this?

[gwnn]

system should be on.

[jjbrr]

whatever systems you play after 1m-1M-2NT should apply i think.

[aguahombre]

And 3D would have been to play? Even 3H might be a safer rebid if interested in whether partner has 4H or 3S.

[ggwhiz]

What would double instead of 2nt show?

Support?
Hearts?
Big Balanced?.... Then what is 2nt? In BBO it's often the same 4x3 12 count I would have passed in first chair.

With the lack of a double (or pass), in all cases, you can find out what you need to know by bidding 3♥ or 3♦ to force.

I see no reason to lose a 3♣ bid to show a piece of cheese with 9 black cards in it.

[aguahombre]

A fallback rule we have found useful: in competetition, when we bid partner's suit --it shows partner's suit.

[gwnn]

BTW in my most regular partnership we have the following very inferior system over 2NT rebids:

3C=checkback
3D=nothing
3H=5-5
3S=6+, forcing.

if you agreed that 3C is checkback, it's always checkback.

[hanp]

I would assume 3C = natural NF after the interference, 3D artificial GF (i.e. checkback), unless discussed otherwise.

[pooltuna]

gwnn, on Jun 16 2010, 09:56 AM, said:

system should be on.

100% agr

[FrancesHinden]

hanp, on Jun 16 2010, 04:58 PM, said:

I would assume 3C = natural NF after the interference, 3D artificial GF (i.e. checkback), unless discussed otherwise.

100% agree

By the way, as far as I'm concerned, agreeing "checkback Stayman" mean we've agreed to an artificial 2C rebid after partner's 1NT rebid. It's doesn't automatically apply after a 2NT rebid unless we've specifically agreed that it does.

[gwnn]

FrancesHinden, on Jun 16 2010, 05:07 PM, said:

By the way, as far as I'm concerned, agreeing "checkback Stayman" mean we've agreed to an artificial 2C rebid after partner's 1NT rebid. It's doesn't automatically apply after a 2NT rebid unless we've specifically agreed that it does.

I agree with this part. I didn't realise what the exact wording in the OP meant.

[neilkaz]

FrancesHinden, on Jun 16 2010, 12:07 PM, said:

hanp, on Jun 16 2010, 04:58 PM, said:

I would assume 3C = natural NF after the interference, 3D artificial GF (i.e. checkback), unless discussed otherwise.

100% agree

By the way, as far as I'm concerned, agreeing "checkback Stayman" mean we've agreed to an artificial 2C rebid after partner's 1NT rebid. It's doesn't automatically apply after a 2NT rebid unless we've specifically agreed that it does.

We also agree.

[ggwhiz]

Quote

By the way, as far as I'm concerned, agreeing "checkback Stayman" mean we've agreed to an artificial 2C rebid after partner's 1NT rebid. It's doesn't automatically apply after a 2NT rebid unless we've specifically agreed that it does.

You are correct apparently but I'm shocked. Shocked!

In the good ole days, Checkback Stayman was over a 2nt rebid period.

It did not exist over a 1nt bid until Eddie Kantar came along and that convention was named Kantar 2♣ as opposed to new minor forcing which arrived at about the same time.

I wonder when it changed?

[P_Marlowe]

3C is NF.

Sry, they gave you a natural forcing bid (3D), why does one need a 2nd one?

With kind regards
Marlowe

[jh51]

Thanks for all the great responses. Given that this was the first time I had played with this partner and we had met 15 minutes before game time, I am sure you can appreciate that there was not a lot of discussion on partnership agreements.

When in doubt, I probably should have cue bid 3♦ and hope partner does something intelligent with it.

As it was, I had a big hand (19HCP) with 9 black cards in it. 11 easy tricks in NT or clubs, 12 if you can guess to drop the Q♣ offside, but missing 5 clubs that's not likely.

[Elianna]

jh51, on Jun 16 2010, 12:41 PM, said:

Thanks for all the great responses. Given that this was the first time I had played with this partner and we had met 15 minutes before game time, I am sure you can appreciate that there was not a lot of discussion on partnership agreements.

When in doubt, I probably should have cue bid 3♦ and hope partner does something intelligent with it.

As it was, I had a big hand (19HCP) with 9 black cards in it. 11 easy tricks in NT or clubs, 12 if you can guess to drop the Q♣ offside, but missing 5 clubs that's not likely.

I thought you were responder, but you had 19 points?

Opener's 2NT rebid should show 18-19 points. Even though opener is forced to bid at the 2-level. With the regular 12-14, opener should pass instead of bidding 2NT.

[Hanoi5]

I'd use their suit as checkback.