BBO Discussion Forums: What do you ihink of this one - BBO Discussion Forums

Why gib chooses ♥ and not ♦

cencio, on 2026-January-09, 03:33, said:

well clearly and sadly the Blackwood was after your heart bid
sad really

I am almost surprised that N did not preempt

But from where I am sitting your bidding was fine.

Except. does 5D mean 4 keycards or not - is it 0314 or 1403 or what does it play

Tell me was this GIBBO or GiB?

Hi,

#1 North: obv. most human would open 3D, maybe 4D, but it may not
fullfill the specified req. for an 3D/4D opening
#2 South: Opening 2C is ok, ..., I may have decided to go with 1C,
but you have 23HCP
3C is also ok, but I think over 3D you should bid 3NT
3H sounds a lot like 64 to me.
#3 North: after 3H has a difficult decision, ..., obv. he could bid
4D, but this bid would beg the question, why did he not open 3D / 4D
I also dont think 3H is pretty well defined, so what ever happens
after 3H is random.

With kind regards
Marlowe

I've always been advise by top players to choose a 4-4 fit in your own hand over any known, assumed or hoped 4-4, 5-3, 6-2 fit in two hands. As for any rule there are exceptions , but I live by this rule to great satisfaction. So I think 4NT/6♥ is insane.

Apart from this I don't like how 2♣ takes away so much bidding space, which potentially is why the bot decides to do this. I'd open a heavy 1♣ which hardly ever leads to a problem with these bots as they allow for very HCP heavy openings anyway.

Wy didn't you rebid 2N?

fuzzyquack, on 2026-January-10, 01:03, said:

Well, it could work in general, but on this hand, maybe GIB North will drive to 7♦ or 7NT.

I put these hands on another computer bridge program with south dealing. (I felt that North should have opened 3D or 4D.) I got the following auction:

South North
2C 2D
3C 3D
3H 5D
6D

This auction seems to be pretty rational. The 5-diamond bid shows North's length in diamonds. South singleton ace was sufficient to take it to slam.

In the play, South takes 12 tricks, losing only the queen of diamonds. North's two hearts are pitched on the king of spades and the king of clubs.

My overall opinion is that the bidding judgment of the GIB is greatly impaired and that they could learn a lot more from other commercial bidding programs.

dsharpcctx, on 2026-January-10, 22:15, said:

Actually, IMHO, that bidding looks pretty haphazard.

They got to a makable contract, which is far better than the results that actually happened at the table. Admittedly, the 6-D bid is a stretch. But the 5-D bid by North is far better than the 4-NT and 6-H bids that actually happened.