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What version of 2/1?

#1 User is offline   Creeksider 

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Posted 2011-February-23, 09:22

GIB's card says it plays 2/1 game forcing. I thought this would apply to all 2/1 bids, but apparently it doesn't apply when 2 is bid over 1:

Handviewer link

I was surprised to see only 11 points required for the 2/1 bid from an unpassed hand, and was thinking that's too light for a game forcing bid. Sure enough, GIB passed at 3.

The only book I've read on 2/1 so far (Grant & Rodwell) indicates game force applies to all 2/1 bids, including 2 over 1. I understand there are variations, such as game forcing except when suit is rebid. GIB's convention card indicates it does not use this approach, and just says 2/1 is game forcing. What gives?
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#2 User is offline   NOosAnCE 

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Posted 2011-February-23, 11:13

GIB is inferior bridge software, better play with Jack, you waste your time finding out how GIB robots bid and/or play. Jack is multiple world champion.

 Creeksider, on 2011-February-23, 09:22, said:

GIB's card says it plays 2/1 game forcing. I thought this would apply to all 2/1 bids, but apparently it doesn't apply when 2 is bid over 1:

Handviewer link

I was surprised to see only 11 points required for the 2/1 bid from an unpassed hand, and was thinking that's too light for a game forcing bid. Sure enough, GIB passed at 3.

The only book I've read on 2/1 so far (Grant & Rodwell) indicates game force applies to all 2/1 bids, including 2 over 1. I understand there are variations, such as game forcing except when suit is rebid. GIB's convention card indicates it does not use this approach, and just says 2/1 is game forcing. What gives?

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#3 User is offline   Rain 

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Posted 2011-February-23, 14:57

I think this 1D-2C is part of the tweaks/improvements introduced last week.

http://webutil.bridg...etch.php?id=535

This non gf is specific to 1D-2C-2D-3C because both parties are showing min/non fits?

The alert should not say it is game forcing. It is F1.
In the case of game forcing auctions, it would probably say "forcing to 3NT" to indicate game force.
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#4 User is offline   barmar 

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Posted 2011-February-23, 16:14

The comments in the link that Rain posted say that in a few weeks Uday is planning on revising GIB's 1D-2C structure to make it game forcing, with 1D-3C showing an invitational hand with long clubs. I think this is the more common treatment these days (it's what I play with most of my partners).

#5 User is offline   Rain 

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Posted 2011-February-23, 16:40

Err let's not commit to a date! More frequent updates does not equate to a few weeks. Certainly true that more Robot improvements are being planned and worked on right now. And the goal is to do more upgrades, more frequently. But I wouldn't say it's a few weeks....
"More and more these days I find myself pondering how to reconcile my net income with my gross habits."

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#6 User is offline   barmar 

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Posted 2011-February-23, 16:50

 Rain, on 2011-February-23, 16:40, said:

Err let's not commit to a date! More frequent updates does not equate to a few weeks. Certainly true that more Robot improvements are being planned and worked on right now. And the goal is to do more upgrades, more frequently. But I wouldn't say it's a few weeks....

Uday wrote: "2 weeks from now (might be 3)". How does that not equate to a few weeks? My paraphrase was less committal than he was.

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