[1eyedjack]

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MP

I should be interested to read views on what options are available to South, responder, on his second turn, ranked by preference. Assuming that you agree with the auction up to that point, of course.

I reckon that there may be up to 3 possible approaches to answering this.

One is to ask: what would GIB bid, sitting South?

Another is to ask: Playing in a GIB tournament, which bid is likely to have most success?

A third is to ask: If you were playing with a human partner of choice, but forced to play something akin to Gibberish, at least up to that point, what would be your preference?

Finally, I have observed that lately GIB is not averse to rebidding 1NT with a singleton in responder's suit. So not averse, in fact, that it has been known to rebid 1N with 5521 shape (there is a thread somewhere in these columns with that example). That being the case, why would GIB not rebid 1N on this North hand? It would certainly take South's problems away.

[Bbradley62]

Your auction looks completely normal to me.

[1eyedjack]

2D was natural in principle. It even precedes the explanation with the narrative "New suit -". This additional verbiage seems entirely superfluous unless we insert an implied "natural".

Per the description GIB accepts that it may be as few as 3. But xx?

[lycier]

Here both of Gib's bidding and explanations are no problem.

This 2♦ is a complex issue actually,some players are regarded as NMF,some as relay bid,some as specific artificial.
So whatever it is,2♦ isn't a natural bid in principle basically.

2♦ operates similar to Stayman, it allows the 11+ point responder to explore a game fit by discovering the suit length and specific strength. 2♦ says nothing about the new minor. 2♦ is strictly conventional (alertable), both artificial and forcing.

If you disagree,maybe Gib CC is an exception? I don't know.
I don't hope we will go on discussion on it because this issue will involve in Gib CC which aren't allowed to discuss.

[iandayre]

The correct responder rebid here is indeed 2D. This is one area in which GIB's version of 2/1 is compatible with generally accepted methods. The only possible alternative is 3NT but with both unbid suits unstopped, that is a very poor option. Less so with GIB, since it tends to make very passive leads and you are more likely to get away with bidding 3NT with a suit unstopped, but still 3NT is not a sound action. 2D also leaves open playing 4S on a 5-3 or possibly a 5-2 fit.

To your other point, I have never liked rebidding 1NT as opener with a singleton in responder's suit. But with GIB, the auction 1m-1S-2m-2H is also game forcing, which is NOT consistent with sound methods. You can easily miss a 4-4 or even 5-4 H fit by rebidding the minor. Solutions are either to rebid 1NT or to treat a strong 4 card H suit as a 5 carder and open 1H!

[1eyedjack]

iandayre, on 2015-June-03, 14:11, said:

The correct responder rebid here is indeed 2D.

In which case the explanation attached to 2D needs correcting.

iandayre, on 2015-June-03, 14:11, said:

To your other point, I have never liked rebidding 1NT as opener with a singleton in responder's suit.

Chacun a son gout.

I couldn't make a better case for the treatment than this:
http://tinyurl.com/ppfzwte

Mind you, I was weaned on weak 1N opener, where the dynamics of rebidding 1N with a singleton and values for strong 1N are a bit different.

[diana_eva]

I gave the hand to advanced robots, and they bid it:

1c - 1s
2c - 2d
2n - 3c
3n AP

[1eyedjack]

Thanks d_e

It might save some wasted bandwidth in the forums if minions such as I had the facility to replicate that test.

[diana_eva]

1eyedjack, on 2015-June-04, 02:07, said:

Thanks d_e

It might save some wasted bandwidth in the forums if minions such as I had the facility to replicate that test.

I didn't use any magic tools for this. Just entered the cards in Hand Editor, opened a teaching table and loaded the hand there with adv robots as N/S. However it's better to ask "what wd GIB do" here, and have me run the test, than spend $1 from your own pocket just to see what happens if a robot takes your seat

[iandayre]

1eyedjack, on 2015-June-03, 14:27, said:

In which case the explanation attached to 2D needs correcting.Chacun a son gout.

I couldn't make a better case for the treatment than this:
https://www.youtube....h?v=LFBoNgdDmPg

Mind you, I was weaned on weak 1N opener, where the dynamics of rebidding 1N with a singleton and values for strong 1N are a bit different.

I'm sorry your son Chacun has gout, but what does it have to do with bridge??

Seriously, my wife speaks French, I'll have to ask her to translate. I tried the link but it didn't work.

[1eyedjack]

@ian

sorry for delay. Chacun a son gout, translation:
http://tinyurl.com/pndh7mh

And I have fixed the other link by editing the original post #6 in this thread.