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Eelementary question on BART convention

#1 User is offline   Chamaco 

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Posted 2004-October-03, 14:48

Hi all :)

I have a question on the BART convention.

All sources on BART refer to the sequence:
1:1NT*
2: ?

Where 2 is a relay used to describe several hand types.

The question is:
how do you deal with those hannd types when opener responds 2 rather than 2 ?
If I agreed to play BART, does it mean that 5332 openers always rebid 2 even holding a doubleton ?
And what should be opener's rebid holding 5 spades and 4/5 diamonds ? A natural 2D (which does not alow for accurate responder's description with BART) or an artificial 2C (to allow responder using BART) ?

In both cases, a 2D rebid by opener would make it impossible for responder to differentiate his hand type, when holding a hearts-based hand.

Thanks all!
"Bridge is like dance: technique's important but what really matters is not to step on partner's feet !"
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#2 User is offline   Stephen Tu 

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Posted 2004-October-03, 15:16

Quote

how do you deal with those hannd types when opener responds 2 rather than 2 ?


You don't. Standard Bart only applies after 1-1nt-2. There is an article in Granovetter's For Experts Only collection, that describes a possible artificial system after 2 (along with a different version after 2).

Quote

If I agreed to play BART, does it mean that 5332 openers always rebid 2 even holding a doubleton ?


This is optional. If you do this, you will increase your chances to use the gadget, but you also increase chances of playing in some 2-3, 2-4 club fits, plus some 2-5 at 3.

Quote

And what should be opener's rebid holding 5 spades and 4/5 diamonds ? A natural 2D (which does not alow for accurate responder's description with BART) or an artificial 2C (to allow responder using BART) ?


You definitely want to bid 2 with 4+ D. Bart already makes it hard to play in diamonds since responder can't show them at the 2 level. If opener can't show them either, you could be playing your 3-1 club fit instead of a 9 cd diamond fit :). You also make it harder for responder to raise clubs when appropriate.

Quote

In both cases, a 2D rebid by opener would make it impossible for responder to differentiate his hand type, when holding a hearts-based hand.

Sure, but bidding 2 always will almost certainly lose you too many minor partscore decisions to make up for the occasional gain in finding the 5-3 or 5-2 heart fits. If you are worrying about missing hearts, lower your requirements for 1-2 (i.e. don't play as GF), and/or let responder rebid 2 on only 5 after 2, let opener pull back to 2 with stiff.
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