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(p)-p-(1♠)-X
(p)-1NT-(p)
1NT is alerted as "1NT to double, 7-10, stop in ♠". Now 2♦ by doubler, instead of showing some sort of big double type of hand, shows 11- HCP, 5+ ♦.
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Does GIB play DLC? Different-level conversion
#1
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Posted 2013-March-26, 02:08
#2
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Posted 2013-April-09, 11:36
Normally a new suit by a doubler shows a big hand, because his partner may have been forced to bid with 0 HCP. Since the 1NT response shows a moderate hand, the new suit doesn't show as big a hand.
#3
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Posted 2013-April-09, 21:04
I'm not sure that makes a lot of sense, but I'm not a very good Bridge theorist.
#4
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Posted 2013-April-09, 21:55
You are right, barmar's explanation makes no sense.
Even so, this is a good way to play 2minor rebids over 1NT. If partner bids a suit after your takeout double (instead of 1NT), you will never need to remove partner's bid out of fear, i.e. you double showing at least tolerance for the other suits, partner picks one of these suits, end of story. Removing to a new suit therefore shows a good hand (assuming no ELC). However, suppose you have doubled on a 0454/0463/1453 etc 9-10 count or so (depending on vulnerabity etc), why should you be forced to be dummy in 1NT, knowing you probably have less than half the deck and a decent contract elsewhere? Being able to bid a 5 card suit NF seems more logical.
If you do have the strong hand, you can bid 3♦, 3NT, etc, so you lose nothing by playing the 2 level bids as weak.
Even so, this is a good way to play 2minor rebids over 1NT. If partner bids a suit after your takeout double (instead of 1NT), you will never need to remove partner's bid out of fear, i.e. you double showing at least tolerance for the other suits, partner picks one of these suits, end of story. Removing to a new suit therefore shows a good hand (assuming no ELC). However, suppose you have doubled on a 0454/0463/1453 etc 9-10 count or so (depending on vulnerabity etc), why should you be forced to be dummy in 1NT, knowing you probably have less than half the deck and a decent contract elsewhere? Being able to bid a 5 card suit NF seems more logical.
If you do have the strong hand, you can bid 3♦, 3NT, etc, so you lose nothing by playing the 2 level bids as weak.
That's impossible. No one can give more than one hundred percent. By definition that is the most anyone can give.
#5
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Posted 2013-April-10, 12:00
I haven't actually looked at this specific rule. But many of GIB's rules are specified in the form "Our side needs at least X combined points to make this bid". So if partner has already shown Y points, the bid shows X-Y points. If that's how the rule for "double then bid a new suit" is written, the explanation I gave follows automatically from it.
#6
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Posted 2013-May-13, 15:44
Bug fixed in next v27.
Issue was GIB miscounts 3rd or 4th seats and mixes explanations limiting doubler.
That applied only after 3rd seat opening and Doubler later introduces new suit.
It used to be:
i.e.
(p) - (p) - 1♥ - Double
(p) - 1NT - * - 2♠- -- 5+ ♠; 11- HCP
Now will be
i.e.
(p) - (p) - 1♥ - Double
(p) - 1NT - * - 2♠- -- -- 5+ ♠; 17+ HCP
Issue was GIB miscounts 3rd or 4th seats and mixes explanations limiting doubler.
That applied only after 3rd seat opening and Doubler later introduces new suit.
It used to be:
i.e.
(p) - (p) - 1♥ - Double
(p) - 1NT - * - 2♠- -- 5+ ♠; 11- HCP
Now will be
i.e.
(p) - (p) - 1♥ - Double
(p) - 1NT - * - 2♠- -- -- 5+ ♠; 17+ HCP
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