[hemminki]

There is a systematic insanity in the bidding when
the auction has gone like this: (x and y are suits)

(1x) - Dbl - (P) - 3y; (P) - 3NT.
3NT is logical against the extras (3y) from the robot
but 3NT means 22+p to robot and it almost always bids
a slam. Please correct this.

[Bbradley62]

Which suit is higher ranking: x or y? Did you look at the description of the 3y bid?

[gwnn]

It shouldn't matter if x or y is higher ranking or what the description is. If 3y is non-forcing and limited, 3NT should deny slam interest and ask for partner to shut up. An exception could be a very distributional advancer signing off in 4M (y=M) or perhaps 5m. Going for slam for responder is impossible here and is a serious bug.

[Bbradley62]

gwnn, on 2015-November-20, 07:25, said:

It shouldn't matter if x or y is higher ranking or what the description is. If 3y is non-forcing and limited, 3NT should deny slam interest and ask for partner to shut up. An exception could be a very distributional advancer signing off in 4M (y=M) or perhaps 5m. Going for slam for responder is impossible here and is a serious bug.

I would expect (1M)-Dbl-(P)-3m to be natural, forcing and unlimited. (1m)-Dbl-(P)-3M might be different. This is why I asked. Of course, 3N shouldn't show 22+, but I was trying to pin down the circumstances under which the bug exists.

[gwnn]

What?? 1M-x-p-3m is like 8-11, 5+ suit (GIB also does it with a 4-carder but that's a different question). Who plays it as forcing? GIB definitely doesn't. Never heard of anyone who does.

[1eyedjack]

Bbradley62, on 2015-November-21, 08:47, said:

I would expect (1M)-Dbl-(P)-3m to be natural, forcing and unlimited. (1m)-Dbl-(P)-3M might be different. This is why I asked. Of course, 3N shouldn't show 22+, but I was trying to pin down the circumstances under which the bug exists.

Out of curiosity, what do you expect advancer to bid with natural, non-forcing, limited hand in a minor with values worth showing?

[hemminki]

1eyedjack, on 2015-November-21, 11:03, said:

Out of curiosity, what do you expect advancer to bid with natural, non-forcing, limited hand in a minor with values worth showing?

It is easy to reproduce the bid in the bidding table by limiting
say East (Robot, 12-13p), West (Robot, 0-3p) and North (Robot, 0-10p) and setting the dealer
to East only. In my test case I got (1H) - Dbl - 3C (explained 4+C 9-11 total points) and 3NT = 22-25hcp
and stop in hearts. The North with 11+total point Gib-hands go via a cue bid if NT bids are not the case.

[iandayre]

This is a well-documented problem that has been discussed here many times. I have sent a few Robot Reports about it. We are all still awaiting the fix. Obviously, after partner has shown values with the jump advance, 22 HCP are not needed for 3NT.

Any single jump advance to a takeout double of 1 of a suit is invitational, never forcing. Makes little or no difference if the jump is to the 2 or 3 level.

A DOUBLE jump advance below game such as 1C - Dbl - P - 3M is quite rare. I believe the standard treatment to be preemptive. I have never had GIB make this call with me, nor have I ever held a hand where I wanted to make the call, so I don't know how GIB would treat it.

[gordontd]

Bbradley62, on 2015-November-21, 08:47, said:

I would expect (1M)-Dbl-(P)-3m to be natural, forcing and unlimited.

I think you are on your own there!