[thorvald]

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5♣ is explained as 5+♦ and strong rebiddable ♣

No funny going down in 5♣, where 6♦ is making

[pescetom]

You could at least humour him with 5♦ rather than pass?

[smerriman]

pescetom, on 2022-October-13, 14:38, said:

You could at least humour him with 5♦ rather than pass?

I assume the diagram was wrong and the dealer was South, not North, and it's the robot that passed 5♣. And that the robot actually had 13 cards (rather than the 12 shown).

I also expect 5♣ will probably be incomprehensible / undefined to the robot, regardless of what the description says.

[johnu]

GIB's pass of 5♣ is known as a negative preference bid. This bid is a cornerstone of the 2 card major system.

[thorvald]

smerriman, on 2022-October-13, 15:14, said:

I assume the diagram was wrong and the dealer was South, not North, and it's the robot that passed 5♣. And that the robot actually had 13 cards (rather than the 12 shown).

I also expect 5♣ will probably be incomprehensible / undefined to the robot, regardless of what the description says.

Diagram fixed and 5♣ is defined (based on the explanation)

[smerriman]

As mentioned in the past, the fact it shows a description doesn't mean it's a defined bid. But it may be; will check this later.

[smerriman]

Well, basic GIB at a bidding table bids 5♦, so the book bid is correct.

Older GIB also has 5♦ as the book bid. When it attempts to simulate, it can't find a single hand that is remotely close to what it thinks South is showing, thus also makes the book bid of 5♦. That's mainly because it thinks to bid 5 of a minor you need a combined 29 points, and it has promised none, but 1♦ also had a maximum of 22, which is a contradiction. It merges those in the description to exactly 22 points, but clearly still can't understand it.

Who knows why your robot strayed from the book bid; maybe it found a single hand which it thought was close enough, and on that hand, 5♣ was fine. Or maybe it crashed while failing to simulate any hands, and ended up passing rather than making the book bid.

[gszes]

The "pass" is merely the manifestation of a much greater problem. NOONE defines every possible sequence and the mere idea is poor at best. If GIB does not know what a bid means it should assume natural and do the best it can (like a gasp human). Stop letting GIB pass in 42 (OR WORSE) fits if it is at all possible to go to another place even if it is at a higher level.