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gib is a spy

#1 User is offline   gwnn 

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Posted 2010-March-30, 13:36

1♠-2♠
2NT*-3♣*
3♠-4♠

2NT was a game try with unspecified shortness. 3♣ is 7-10 with 3+ spades (i.e. nothing). but 3♠ doesn't say anything about his hand :) What does this sequence mean?
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#2 User is offline   barmar 

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Posted 2010-March-31, 23:39

Isn't 3♣ asking where the shortness is? I don't think GIB's bid explanation says this, but I'm pretty sure that the next step is the asking bid.

I guess 3♠ shows shortness in clubs.

#3 User is offline   gwnn 

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Posted 2010-April-01, 03:40

that's why I'm asking. I felt like I had information withheld from me. (and yes declarer did have ♣ shortness)
... and I can prove it with my usual, flawless logic.
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#4 User is offline   Free 

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Posted 2010-April-01, 07:28

2♠ is 7-10 with 3♠
3♣ is the same but it's basically a relay (poor explanation)
3♠ is short ♣ if 3♣ was asking

I guess the explanations could be better :)
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#5 User is offline   barmar 

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Posted 2010-April-02, 08:24

Since 2NT shows unspecified shortness, how else do you think it could ask where the shortness is? While I agree that the explanation could be explicit, it's pretty common for conventions like this to use the next step as the asking bid.

#6 User is offline   gwnn 

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Posted 2010-April-02, 08:27

3C is a relay but 3♠ should say 'short clubs' shouldn't it?
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#7 User is offline   barmar 

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Posted 2010-April-02, 08:45

Yes. 3♦ and 3♥ show shortness in the suit bid, so by process of elimination 3♠ must show shortness in ♣. 2NT was a game try, not a game force, so you can't use any bid past 3♠ to respond.

#8 User is offline   jdonn 

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Posted 2010-April-02, 10:11

barmar, on Apr 2 2010, 09:45 AM, said:

Yes. 3♦ and 3♥ show shortness in the suit bid, so by process of elimination 3♠ must show shortness in ♣. 2NT was a game try, not a game force, so you can't use any bid past 3♠ to respond.

How would we know they don't use lowest for lowest (3♦ short clubs, 3♥ short diamonds, 3♠ short hearts) unless 3♠ were alerted?
Please let me know about any questions or interest or bug reports about GIB.
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#9 User is offline   bb79 

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Posted 2010-April-02, 11:57

I checked, alert of 3♦ says : SSGT 1-D 5+S 17-18 pts, alert of 3♥ says : SSGT 1-H 5+S 17-18 pts, alert of 3♠ just says 5+♠ 17-18


if the auction starts 1♥-2♥, 2♠ is unspecified shortness, 2nt asks , alert of 3♥ explicitly says spade shortness.
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