Robot passes raise of minor after 2/1 game force

[bixby]

My hand was A102/6/AK1073/K962 and my robot partner had J98/Q84/4/AQJ1054. We were not vulnerable, opponents were. Matchpoints.

 

I opened 1D in second position, my partner bid 2C (explained as forcing 2/1, forcing to 3NT), I bid 3C (also explained as forcing to 3NT), and my partner passed. We made +150 for a poor matchpoint score. I seem to recall having this same sequence once before.

 

Has anyone else run into this? Is this a bug?

[zhasbeen]

My hand was A102/6/AK1073/K962 and my robot partner had J98/Q84/4/AQJ1054. We were not vulnerable, opponents were. Matchpoints.

 

I opened 1D in second position, my partner bid 2C (explained as forcing 2/1, forcing to 3NT), I bid 3C (also explained as forcing to 3NT), and my partner passed. We made +150 for a poor matchpoint score. I seem to recall having this same sequence once before.

 

Has anyone else run into this? Is this a bug?

 

Go to this link http://www.bridgebase.com/doc/gib_system_notes.php

 

Then select "Click here to see GIB's convention card" at top of page. See "Other" in red on bottom line of "MINOR OPENING" section of the card. You will see 2C resp to 1D opening is not game forcing.

 

The definition explanations that you will see when you run your cursor over the different calls during the auction are often wrong. This is especially true of the "forcing to 3NT" that you'll see even when the bid was made by a passed hand.

 

I would say that you are better often reading the explanations than not, but be prepared for them to be partially wrong or completely wrong for some sequences. The best you can do is keep a copy of the GIB card at your side, read the definitions when they are available, and play lots of robot tournaments to gain experience. Even then you will be hard pressed to make it thorough a match without at least one board being adversely affect by a GIB action.

[helene_t]

There may be a hole in the system with invitational hands with long clubs.

 

But even if the 2♣ response is not GF, opener's raise should still be forcing.

[smerriman]

I posted a bug report about this mid-2016, so it's known, just apparently not a priority.

[bixby]

Go to this link http://www.bridgebase.com/doc/gib_system_notes.php

 

Then select "Click here to see GIB's convention card" at top of page. See "Other" in red on bottom line of "MINOR OPENING" section of the card. You will see 2C resp to 1D opening is not game forcing.

 

The definition explanations that you will see when you run your cursor over the different calls during the auction are often wrong. This is especially true of the "forcing to 3NT" that you'll see even when the bid was made by a passed hand.

 

I would say that you are better often reading the explanations than not, but be prepared for them to be partially wrong or completely wrong for some sequences. The best you can do is keep a copy of the GIB card at your side, read the definitions when they are available, and play lots of robot tournaments to gain experience. Even then you will be hard pressed to make it thorough a match without at least one board being adversely affect by a GIB action.

 

Thank you for this very informative reply.

[jdonn]

It's a long known issue that I hope to have fixed in the next update down the road.