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Opener's No Trump rebid after interference.

#1 User is offline   Liversidge 

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Posted 2017-June-18, 22:31

Playing a weak No Trump, suppose I have a 15+ balanced hand. Besides having a stop, what point count do I need to have in order to rebid No Trumps after the following sequences.

i) 1 - (P) - P - (1) - ?
ii) 1 - (P) - P - (2) - ?
iii) 1 - (P) - 1 - 2 - ?
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#2 User is offline   spotlight7 

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Posted 2017-June-18, 23:34

1) 18-19HCP, partner passed so game is unlikely. You want to compete for the part score and show 18-19.

A pass here shows a 15-17 range in my style. If you were unbalanced, you would bid a suit here.


2) There is no natural 2N bid opposite a passed partner.


3) Partner bid so 2N bids are 17-18.

With 15-16 my style is to pass here. With an unbalanced hand, you would bid a suit here.
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#3 User is offline   ahydra 

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Posted 2017-June-19, 02:52

In 1) I play a 1NT rebid as 17-19.

In 2) 2NT could possibly be bid with a very good hand but more likely you don't want to play NT. If you have a suitable hand, feel free to X to find a playable partscore.

In 3) I normally play 2NT = 15-17 (not without risk - perhaps "good 15"), 3NT = 18-19.

ahydra
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#4 User is offline   Zelandakh 

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Posted 2017-June-19, 06:13

I think the traditional "standard" agreements are 18-19 for i and iii and DNE for ii, though there is some potential for shading as noted by previous posters. With a strong NT in i or ii (passed partner) you either pass or double depending on shape, vulnerability and scoring. In iii a strong NT will usually double and the sequence - "1X - (P) - 1Y - (2Z); X" - is commonly dubbed the strong NT double for this reason.
(-: Zel :-)
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#5 User is offline   Liversidge 

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Posted 2017-June-19, 10:22

View PostZelandakh, on 2017-June-19, 06:13, said:

DNE for ii ?

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#6 User is offline   rmnka447 

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Posted 2017-June-19, 11:01

i) - With partner passing the opening bid presumably showing less than 5, 1 NT should show 18-19 and a stopper.

ii) - Likewise, 2 NT should show 18-19 and a stopper.

iii) - Since partner has responded, 2 NT should show the 15-17 balanced hand and stopper. 3 NT should show 18-19 and stopper.
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#7 User is offline   Zelandakh 

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Posted 2017-June-19, 11:39

DNE = does not exist.
(-: Zel :-)
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#8 User is offline   Tramticket 

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Posted 2017-June-19, 11:44

"DNE for ii?"

DNE = Does Not Exist. There is no balanced hand worth a 2NT bid opposite a passed hand, that hasn't already opened 2NT.

Change the opening to 1D and a 2C overcall and I would expect the call to be based on a long running diamond suit. Less likely though if the opening is a major.
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#9 User is offline   Zelandakh 

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Posted 2017-June-19, 11:58

View PostTramticket, on 2017-June-19, 11:44, said:

Change the opening to 1D and a 2C overcall and I would expect the call to be based on a long running diamond suit. Less likely though if the opening is a major.

And if the overcall is a suit other than clubs then 2NT might be Good/Bad or a transfer...but that is going into areas less suitable for N/B so probably better just to have readers avoid making the call completely for now.
(-: Zel :-)
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#10 User is offline   GrahamJson 

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Posted 2017-June-20, 02:03

I'm not sure a point count range is particularly meaningful in the first two cases. Partner is limited to four of five points at most, so he is never going to raise, although he might take out into a long straggly suit. Therefore a NT rebid just shows a hand where you expect to, or at least have good hopes of, making it. This is likely to depend on suit quality and points location more than total points. So, in case 1 you would prefer to rebid 1NT on KQx KQJ10x Axx Jx rather than Axx KJxxx Axx AQ.
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#11 User is offline   miamijd 

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Posted 2017-June-21, 19:09

You didn't indicate the range of your weak NT. Do you play 10-12? 11-13? 12-14?

I'm going to assume you play a standard 11+ - 14 weak NT, with 1m followed by 1NT over partner's rebid showing 15-17. In that case:

(i) 1NT here shows a hand that would rebid 2NT if partner had bid the first time. 18-19; maybe a good 17 that you upgraded to 18. Since you opened 1H, the 17 hand is much more in play (you have a five-card suit, which upgrades the hand). With the 15-16 hand, you have to pass, which is a drawback of the weak NT (in American-style 2/1, you would open 1NT with 15-16 and 5h 332).

(ii) In standard, 2NT wouldn't be an option. This ought to show at least 20-21 (partner is a passed hand over an opponents' pass, after all), but with 20-21 balanced and a 5-card H suit, you should open 2NT, not 1H.

Of course, you can agree to give 2NT a conventional meaning here liek good-bad, but with RHOs bidding 2C, that doesn't make much sense (how do get back to 2h?). That would make a lot more sense if RHO had bid 2S. In that case, a 2NT bid could be used to show 5/5 hearts and a minor suit good-bad (and a 3m bid would show hearts and a minor 16-18 or so).

(iii) Unfortunately, 2NT on this auction has to show the 15-17 hand. Otherwise, what are you supposed to bid with that hand at this point? It's unfortunate, because if you have only 15 or an ugly 16 and partner strained to bid with a weak hand (5 or a bad 6), you are quite likely to be overboard, sometimes very badly so. This is another drawback of the weak NT. Playing 15-17. a 2NT call here would show 17-18 (you would open the 15-16 hands 1NT, but you would open the 17 hand with 5H with 1H in most cases).

Cheers,
mike
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#12 User is offline   Zelandakh 

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Posted 2017-June-21, 23:28

View Postmiamijd, on 2017-June-21, 19:09, said:

(iii) Unfortunately, 2NT on this auction has to show the 15-17 hand. Otherwise, what are you supposed to bid with that hand at this point? It's unfortunate, because if you have only 15 or an ugly 16 and partner strained to bid with a weak hand (5 or a bad 6), you are quite likely to be overboard, sometimes very badly so. This is another drawback of the weak NT. Playing 15-17. a 2NT call here would show 17-18 (you would open the 15-16 hands 1NT, but you would open the 17 hand with 5H with 1H in most cases).

I am guessing you do not personally play a weak NT system. What I wrote in #4 is absolutely standard. It is certainly a drawback of WNT systems that the double performs this duty but much less so than being forced to rebid 2NT here.
(-: Zel :-)
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