[zhasbeen]

I thought I could trust GIB to have what it is supposed to for the 6-4 bar bid, but no more. Since my first robot tournament 5 years ago GIB has only gotten worse. Add another one to the pile of abused conventions. This hand bears no resemblance to the bar bid. In the past it had always had the 4 major, 6 minor distribution it is supposed to.
Just respond Is and rebid 2d after open rebids 1nt. Opener can either pass or correct to 2 spades. Two diamonds is not forcing here.

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[smerriman]

It's not actually anything to do with an abused bar bid convention. The book bid here is actually pass over 1N, which is fine since of course the robot will always figure out it's better to bid diamonds instead. So it's not bidding 3♦ because it thinks it actually has a bar bid, but because it thinks that faking a bar bid will lead to a better result than bidding 2♦.

When I run this with the older version of GIB, it bids 2♦ most of the time, precisely due to the fact that this will occasionally get you playing a better 2♠. But it does bid 3♦ occasionally, because in those simulations, a few of the hands when it went low, the opponent robots actually got into the auction by competing in clubs and you ended up worse off.

With the opponents cold for game in your deal, maybe GIB's bid was genius But probably just an edge case in the long run.

[zhasbeen]

smerriman, on 2022-October-22, 14:18, said:

It's not actually anything to do with an abused bar bid convention. The book bid here is actually pass over 1N, which is fine since of course the robot will always figure out it's better to bid diamonds instead. So it's not bidding 3♦ because it thinks it actually has a bar bid, but because it thinks that faking a bar bid will lead to a better result than bidding 2♦.

When I run this with the older version of GIB, it bids 2♦ most of the time, precisely due to the fact that this will occasionally get you playing a better 2♠. But it does bid 3♦ occasionally, because in those simulations, a few of the hands when it went low, the opponent robots actually got into the auction by competing in clubs and you ended up worse off.

With the opponents cold for game in your deal, maybe GIB's bid was genius But probably just an edge case in the long run.

Actually, the 6-4 bar bid applies only after a minor opening and 1nt rebid. I like 1h-1s-1n-2d with this hand, showing a weak 5-4 or longer. It’s how everyone I know plays it; simple and logical. Ugh on passing 1n.

[thepossum]

Bar bid - obvious joke - its a bid you make after a few too many drinks


Every now and again GiB will rummage around in its bag of bids for a bid that some of us have never seen before

[pescetom]

zhasbeen, on 2022-October-22, 21:21, said:

I like 1h-1s-1n-2d with this hand, showing a weak 5-4 or longer. It’s how everyone I know plays it; simple and logical.

Many of us play that as an artificial game force, so would have to pass with a weak 5-4 and shortage in opener's suit.
But here with 5-6 we could bid 1s then 2c and stop in 2d if we so wished.