Not Unusual for GIB

[pescetom]

MP

[hv=pc=n&e=sjht9da9743caqt95&d=w&v=b&b=4&a=p1s2c(5+clubs,10+HCP,11-18 total points)]133|200[/hv]

 

I could understand a human misreading the clubs as longer than the diamonds (ten written 10 rather than T), but I would expect a robot to bid 2NT here. Instead it bid 2♣.

Is this about needing a 'better than intermediate' hand because vulnerable (see below), or simulations with partner being a passed hand, or what?

I can see the diamonds failing a quality check, but there are plenty of redeeming features with decent chances in a simulation I would expect.

On the actual layout, EW missed 5♦ making in a 9-card fit.

 

 

Unusual NT (when non-vulnerable GIB only does Unusual NT with intermediate hands, xx-KQxxxx KQxxx for example, but it needs a better hand when vulnerable)

[smerriman]

Yes, it bids 2NT with that hand when non-vulnerable, but requires 15 total points when vulnerable (eg add the king of hearts).

 

If you swap the queen of clubs with the queen of diamonds it'll overcall 2♦; it seems with weak hands it bids its better minor. But add the queen of hearts and it'll bid 2♦.

 

(Also, if the opponents compete to 2♠ it'll reverse into 3♦ with those weak hands, lol, so that's clearly a bug rather than a 'I'm only planning to bid one suit when weak'.)

[pescetom]

Yes, it bids 2NT with that hand when non-vulnerable, but requires 15 total points when vulnerable (eg add the king of hearts).

 

If you swap the queen of clubs with the queen of diamonds it'll overcall 2♦; it seems with weak hands it bids its better minor. But add the queen of hearts and it'll bid 2♦.

Thanks.

 

(Also, if the opponents compete to 2♠ it'll reverse into 3♦ with those weak hands, lol, so that's clearly a bug rather than a 'I'm only planning to bid one suit when weak'.)

If the plan is to bid only one suit, then stronger minor rather than the natural diamonds makes some sense: but in that case, stick to it (and I'm not convinced it was the best plan here in any case).

[johnu]

Yes, it bids 2NT with that hand when non-vulnerable, but requires 15 total points when vulnerable (eg add the king of hearts).

 

If you swap the queen of clubs with the queen of diamonds it'll overcall 2♦; it seems with weak hands it bids its better minor. But add the queen of hearts and it'll bid 2♦.

 

(Also, if the opponents compete to 2♠ it'll reverse into 3♦ with those weak hands, lol, so that's clearly a bug rather than a 'I'm only planning to bid one suit when weak'.)

Makes you wonder what the programmer was thinking when this "logic" was implemented.

[pigpenz]

too many weird things with GIB when it comes to competition. Even when raising

a bid by partner even as a passed hand sometimes the explanation might say 14 plus hcp....so

there is no mandatory competion raise with Gib.