[lycier]

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We have 4 keycards with trump Q,why 5♥ signoff?

[Bbradley62]

North doesn't know you have the trump queen, and he has no way to ask. He's probably more afraid of being off two cashing diamonds. A human should foresee this potential problem with RKC and choose to cuebid instead, but maybe GIB isn't capable of looking that far ahead.

[iandayre]

As BBradley suggests, the problem was using Blackwood in the first place with no control in an unbid suit.

[lycier]

Bbradley62, on 2014-July-12, 19:38, said:

North doesn't know you have the trump queen, and he has no way to ask. He's probably more afraid of being off two cashing diamonds. A human should foresee this potential problem with RKC and choose to cuebid instead, but maybe GIB isn't capable of looking that far ahead.

I disagree since my 3♥ have told him that I have extra values - balancing maximum,and generally speaking ,3♥ often shows 6-card actually.

[Antrax]

For GIB 3♥ doesn't show extra trump length, but it does show a balanced maximum, I think 18+ HCP? So GIB is looking at 35+ combined HCP, so you can't be off AK.

[Bbradley62]

I just realized that I posted the same hand twice, commenting on completely different things, so I am now combining the two posts.

(A) We can see the full description of 3♥ at another table...

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So, Antrax is right about GIB's understanding of 3♥, although I think this understanding is not standard.
BBO's step-by-step convention card called "SAYC" also says 3♥ is 18+, with 3N as 15-17, but ACBL's website shows 3N=14-15 and 3♥=16+.

(B) Apparently, this older version of GIB had a different reaction to the 3♥ response to J2N.

This post has been edited by Bbradley62: 2014-July-13, 20:07

[Bbradley62]

This weaker response to J2N from South prompted a different line of bidding from GIB North:

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[lycier]

Bbradley62, on 2014-July-13, 06:18, said:

Apparently, an older version of GIB had a different reaction to this J2N response:

great,convincing comments.

[Lovera]

I think that needs to consider what GIB tells also : 14+ totale points, 5- in H (8421). Than in heart is probable J togheter K. Instead read 14+ as 15. Bidding 4NT GIB must have 2 Aces and this makes 11 points and for the other 4 should be almost a Q than, not having completed, another honor there is (K). It should be helpfull to you.

[lycier]

My robot is basic,advanced robot should play better,maybe there is no problem in advanced robot hand,so I suggest we don't discuss basic robot issues again in my hand.