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Curious cue bid GIB's system again

#1 User is offline   Antrax 

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Posted 2014-March-22, 02:34


In the diagram position, 2♣ is artificial, showing 3+♦, 4+♥, 19-22 TP and forcing to 2♥.
Why?
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#2 User is online   steve2005 

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Posted 2014-March-22, 07:42

good question. I'm kinda old fashioned that way. if I have a monster hand 19-22 I double and collect the huge penalty coming our way!
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#3 User is offline   Bbradley62 

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Posted 2014-March-22, 08:19

In GIBberrish, because East's double shows the black suits, bidding 2♣ would be bidding opponent's suit? But it would be nice to know what distinguishes it from a 4♥ bid, either directly over the double or in the balancing position.
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#4 User is offline   1eyedjack 

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Posted 2014-March-22, 16:49

I am uncomfortable about being denied an opportunity to bid a suit naturally just because an opponent has shown 4 cards in it.
Certainly there are occasions when a cue is more sensibly used as artificial.
And if I were going to bid it naturally I probably would not do it on just a 4 card suit, unless partner has also indicated length.
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#5 User is offline   georgi 

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Posted 2014-March-25, 16:43

View PostAntrax, on 2014-March-22, 02:34, said:

In the diagram position, 2♣ is artificial, showing 3+♦, 4+♥, 19-22 TP and forcing to 2♥.
Why?


First rebid 2♣ would be natural, later it probably looks like waiting bid.

1♦ - p - 1♥ - Double
2♣ -> Opener two rebid -- 4+ ♣; 4+ ♦; 3- ♥; 11+ HCP; 12-18 total points

GIB ignores at this moment 4+ 4+ promises in ambiguous situation where it could be one suiter only.

It will take in account certain 4+ cases like:

1♦ - 1♥ - Double - ?
here it wont bid 1♠ as natural as responder already emphasizes over this. ( it's explained as spades if human decides to bid so, but GIB will rather not ).

Also when there is unusual NT and opponent promises 5+ in some suit this suit is always prevented from natural meaning by anyone of opener+responder pair.

In upper diagram why would you like to compete once it's more likely to be true that Doubler has 4+♠ and 4+♣.

Over 1NT if Doubler had one suiter hand it would proceed. Passing leans to initial case.

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