[bravejason]

I was playing solitaire bridge and I was dealt this hand:

South: S-KQJT8, H-AKQ3, D-A74, C-8

East Robot opened with a pass and the bidding went:

E , S , W , N , E , S , W , N , E , S , W
P , 2C, P , 2N, P , 3S, P , 7S, P , P , P

A club was led by the West Robot and the North Robot tabled this dummy:

North: S-642, H-T95, D-KQJ, C-AKQ6

Everything is wonderful except for the fact that the opponents have the Ace of Trumps.

Why would the North Robot jump directly to 7 spades?

[Bbradley62]

There are times (it's hard to know exactly when) that GIB run simulations to determine what cards his partner holds based on the bidding. In this case, he must have constructed possible hands for you, all of which included ♠AKQ, and he therefore decided he didn't need to ask about keycards. Part of this is that GIB does not expect his partner to open 2♣ with only 19 HCP, regardless of distribution and/or spot cards.

PS: I hope you don't read anything in this explanation as indicating that I approve of GIB's approach.

PPS: It's funny that E/W did not double.

[GreenMan]

If GIB reasonably assumed South had 22+ HCP for the 2♣ opener then that sums to 37, which is enough for a grand.

[johnu]

Solitairebridgeusesbasicrobotssoyougetwhatyoupayfor.Basicrobotsdomanyhopelessbidsandplays.

[bravejason]

Bbradley62, on 2015-May-30, 11:00, said:

...
Part of this is that GIB does not expect his partner to open 2♣ with only 19 HCP, regardless of distribution and/or spot cards.
...

Ah. I bet this is the reason why.

[iandayre]

It's true that the opening hand here is understrength for a 2C opener. That said, KQJTxxx, AKQJ, A, x, is most assuredly a 2C opener, and you are still off the SA. The issue of GIB's failure to use Blackwood on hands where it is easily available is a long-standing issue that deserves to be addressed.

[iandayre]

Duplicate

[johnu]

GreenMan, on 2015-May-30, 12:58, said:

If GIB reasonably assumed South had 22+ HCP for the 2♣ opener then that sums to 37, which is enough for a grand.

How do you like 7 with 37 points missing the ♠K? On a good day, the finesse will work, or GIB will lead the singleton ♠K because double dummy misanalysis says that declarer will correctly drop the king offside.

[jdonn]

One of the things we are working on for an upgrade coming soon is, always bid blackwood 'on the way' when GIB is currently jumping from the 4 level or lower to the 6 or 7 level. Even if blackwood isn't the best bid, it is better than simply jumping to slam since it will avoid grands off an ace or slams off 2 aces that are happening now.