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Jacoby 2NT or show your own suit?

#1 User is offline   cnszsun 

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Posted 2004-April-14, 00:32

You play 2/1 system and use a more complicated version of Jacoby 2NT which can show your partner's extra value, extra trump length and shortness.
Now your partner opens 1 major, you have four trumps support, a good 5 cards suit, and GF strength. Will you respond 2NT or bid your own suit first (supposing your side suit is lower, so you can make 2/1 forcing bid first, then show suport)? Do the suit quality or hand pattern (5422,5431) affects your decision?
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Posted 2004-April-14, 00:56

Depends on the quality of the 5 card suit. I am loth to hide a suit that has good trick taking potential, and would ALWAYS show a 5 carder headed by KJ or better, even with 4 card support for partner.

This concept ties in well with picture bids and Serious, (or frivolous 3N). See the thread where Misho and Ben are hashing out their system:

http://bridgebase.lunarpages.com/~bridge2/...=15&#entry19215
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#3 User is offline   mishovnbg 

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Posted 2004-April-14, 01:12

Agree with Ron, showing bad side suit when you have fit is not good idea. Suit must be good enough to not lose more than 1 trick in it with fill of 1H in p hand. For example Qxxxx is not enough good suit imho, already discussed in 2/1.

Spoiler
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#4 User is offline   joker_gib 

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Posted 2004-April-14, 04:29

I agree with Misho. :rolleyes:

I play a system where 2NT is GF and we only bid a side suit if it's AK, AQ or KQ fifth.

Alain :D
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Posted 2004-April-14, 05:27

I totally agree with all responses. I think it's the standard aproach...
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Posted 2004-April-14, 07:02

Show your own suit and then support, this is true unless your own suit is weak.

You can add to this, should you show your own suit or make a splinter bid. Say you have 4531 distribution with 4 card support. Again, if your suit is strong, show your own suit. If you suit is weak, and your hand is in the right HCP range for a splinter, then splinter becomes reasonable.

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Posted 2004-April-14, 12:50

I guess I stand alone, but we have at least a 9 card major suit fit. Why showing your own suit ? Is it going to do any good ? Not in my eyes, and pd will pretty much never expect 4 card support. Support with support and help pd out. If pd has shortness in your suit, you want to find out directly, also if pd has shortness in other suit.
And last but not least, why help opps ? Roadmapping the defense is never good, but pls continue this nonsense against me, I like it.

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#8 User is offline   Flame 

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Posted 2004-April-14, 15:31

Trpltrbl, on Apr 14 2004, 01:50 PM, said:

I guess I stand alone, but we have at least a 9 card major suit fit. Why showing your own suit ? Is it going to do any good ? Not in my eyes, and pd will pretty much never expect 4 card support. Support with support and help pd out. If pd has shortness in your suit, you want to find out directly, also if pd has shortness in other suit.
And last but not least, why help opps ? Roadmapping the defense is never good, but pls continue this nonsense against me, I like it.

Mike B)

if you open 1sp holding
KXXXX
X
AKXX
KJX

parner responde 2c
you rebid 2d and partner 2sp.
now even without a sefisticated slam bidding ,you can RKB and if p have AQ of spade and 2 aces you can bid 7, counting 13 tricks.
now show me how you do that after 2nt.
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#9 User is offline   Trpltrbl 

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Posted 2004-April-14, 15:45

Flame, on Apr 14 2004, 04:31 PM, said:

if you open 1sp holding
KXXXX
X
AKXX
KJX

parner responde 2c
you rebid 2d and partner 2sp.
now even without a sefisticated slam bidding ,you can RKB and if p have AQ of spade and 2 aces you can bid 7, counting 13 tricks.
now show me how you do that after 2nt.

My pd bids 2NT, and I bid 3, shortness. Am sure my pd is happy with that, since he now knows that I have a fit. So he bids either a quebid or RKC and with all he needs to know, he can even find out about my K of .

Mike B)
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#10 User is offline   Trpltrbl 

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Posted 2004-April-14, 15:51

Flame, on Apr 14 2004, 04:31 PM, said:

if you open 1sp holding
KXXXX
X
AKXX
KJX

parner responde 2c
you rebid 2d and partner 2sp.
now even without a sefisticated slam bidding ,you can RKB and if p have AQ of spade and 2 aces you can bid 7, counting 13 tricks.
now show me how you do that after 2nt.

And how can I possibly count 13 tricks ? On a finesse at best. Like I said come on down and try to beat me with bidding like that. Of course the finesse might always work for you, but when I bid a Grandslam I like to be fairly sure I will make it, since my teammates are not that forgiving.

Mike B)
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#11 User is offline   Flame 

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Posted 2004-April-14, 16:23

I gave you this example when i was declarering in 3nt (down 1) so it wasnt the best example, but still ill bid 7 here which will have lots of chances.
Lets try another example:

KXXXXX
AX
AX
KQX

vs

AQXX
XX
XX
AJXXX

my bidding -
1sp - 2c
2sp - 3sp
4nt - 5sp == two aces + the Q of trump
7sp == counting to 13

now you show me how you bid this to 7sp after 2nt.
when you do that remember that partner can have

AQXX
QXX
QXX
AXX
when you can only take 11 tricks.
or can have

AQXX
KQX
QXXX
XX

again only 11 tricks here

sry for changing this post so many time, Ben you probebly seen another version of this.
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Posted 2004-April-14, 16:31

When I disagree with you I will tell you so... :-0, but FLAME is 100% right here, and the example hands illustrate the point nicely. Sorry mike, but this is clear.

Ben
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Posted 2004-April-14, 16:41

Flame, on Apr 15 2004, 07:23 AM, said:

~snip~
now you show me how you bid this to 7sp after 2nt.
when you do that remember that partner can have

AQXX
QXX
QXX
AXXX
when you can only take 11 tricks.
or can have

AQXX
KQX
QXXX
XXXX

again only 11 tricks here

sry for changing this post so many time, Ben you probebly seen another version of this.

These hands are getting worse every time! These days partner can have a 4-3-3-4 distribution, as well as a 4-3-4-4... :( :D
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#14 User is offline   Flame 

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Posted 2004-April-14, 16:48

Free, on Apr 14 2004, 05:41 PM, said:

Flame, on Apr 15 2004, 07:23 AM, said:


~snip~
now you show me how you bid this to 7sp after 2nt.
when you do that remember that partner can have

AQXX
QXX
QXX
AXXX
when you can only take 11 tricks.
or can have

AQXX
KQX
QXXX
XXXX

again only 11 tricks here

sry for changing this post so many time, Ben you probebly seen another version of this.

These hands are getting worse every time! These days partner can have a 4-3-3-4 distribution, as well as a 4-3-4-4... :( :D

lol i changed it so many times. ill corect.
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#15 User is offline   mishovnbg 

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Posted 2004-April-15, 02:30

Flame, on Apr 15 2004, 12:23 AM, said:

I gave you this example when i was declarering in 3nt (down 1) so it wasnt the best example, but still ill bid 7 here which will have lots of chances.
Lets try another example:

KXXXXX
AX
AX
KQX

vs

1.
AQXX
XX
XX
AJXXX

my bidding -
1sp - 2c
2sp - 3sp
4nt - 5sp == two aces + the Q of trump
7sp == counting to 13

now you show me how you bid this to 7sp after 2nt.
when you do that remember that partner can have

2.
AQXX
QXX
QXX
AXX
when you can only take 11 tricks.
or can have

3.
AQXX
KQX
QXXX
XX

again only 11 tricks here

sry for changing this post so many time, Ben you probebly seen another version of this.

Spoiler
Hi flame!

Examples can't be used as a prove, only as possibilities. The reason is if you can't see how something can be happen (bidded) it does'n mean it can't be done. And way you bid something is not nessesary right way (and your bidding is not right by 2/1 system for example, because you didn't have slam interest to bid 3). Modification of examples can lead to easy missing slam by natural system, for example will you still bid , if they are only 4 cards, but you have K more? As I posted I like to bid bidable suits if possible by my system. BUT!
Of course it is possible to reach much more difficulte slams, playing realy systems, even with not so efficient like MOSCITO, but easy like NTC.

Examples of NTC bidding:

1.
1{10-17, 5+} - 2NT{inv+, 3+fit}
3{max,6,deny singleton/void} - 4{cue}
4{cue} - 4NT{even KC, deny control, slam interest}
5{cue, control, KC enough for slam, missing Q or KC enough for grand} - 5NT{ Q, deny another cue, interest for grand. Note if not 5 cue, then 5 instead of 5NT - deny slam)
6{cue(Q), KC enough for grand} - 7NT(6+2A+5}


2. Note look 1. for meaning of bids.
1 - 2NT
3 - 4
4 - 4 {deny control, not enough good hand for 4NT}

3. Note look 1. for meaning of bids.

1 - 2NT
3 - 4
5{cue,control ,odd KC} - 6 {6+3+1+1+1 ruff or 4th Q usefull}. I am not best declarant, but this slam that you dont like to play is easy even for me :( .

Spoiler
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#16 User is offline   Fluffy 

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Posted 2004-April-15, 04:11

So the question here should be mainly focused on wich kind of suit you think has enough quality to be bid, I agree with misho, KJXXX is good enough while QXXXX is not.

What about AXXXX, KXXXX and QJXXX? are they good enough?.

On the other side..... with 5-4-3-1 with what I consider a not so good suit I am sure I would 100% use splinter and not jacoby, anyone disagrees with that?
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#17 User is offline   mishovnbg 

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Posted 2004-April-15, 07:05

Fluffy, on Apr 15 2004, 12:11 PM, said:

So the question here should be mainly focused on wich kind of suit you think has enough quality to be bid, I agree with misho, KJXXX is good enough while QXXXX is not.

What about AXXXX, KXXXX and QJXXX? are they good enough?.

On the other side..... with 5-4-3-1 with what I consider a not so good suit I am sure I would 100% use splinter and not jacoby, anyone disagrees with that?

Spoiler
Hi fluffy!

Spoiler
It is very easy to decide is your suit enough good. Main rule is with any partner's TH(AKQ) fill in this suit you will give max 1 trick to opps.
In your examples:

Axxxx or Kxxxx is not enough opposite Qxx, because you can give 2 tricks there.
QJxxx is an exception, because opposite Kxx or Axx you can't give more than 1 trick, but you don't have control in bidded suit, while looking for slam - depend of your partnership agreements. Shortly any 2 of 4 honours is enough. Repeating such suit as cue bid show I honuor more to total of 3. Same bidding allow to catch some unusual slams on side/trump suits or NT like AKJxx<->Q or even AKQxx<->J, because your parner know, that even singleton honour means solid suit it this case.

Spoiler
Modern treat of Splinter convention is: limit raise to level of splinter, where singleton is already count as source of ruffing tricks ( distributional points). This mean with honour strength for jacoby 2NT you can't use Spliner. There are different methods to bid with such hands. One of them is to change one of useless bergen raises to show exactly this type of hand, how it is in Rumen-Kalin system.

Spoiler
Misho
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Posted 2004-April-15, 07:34

Fluffy, on Apr 15 2004, 05:11 AM, said:

So the question here should be mainly focused on wich kind of suit you think has enough quality to be bid, I agree with misho, KJXXX is good enough while QXXXX is not.

What about AXXXX, KXXXX and QJXXX? are they good enough?.

On the other side..... with 5-4-3-1 with what I consider a not so good suit I am sure I would 100% use splinter and not jacoby, anyone disagrees with that?

I posted this answer above at Ben's first reply to this thread. I will repeat it here. If your suit is weak (Kxxxx), and if you hand is narrowly defined within the range you use splinters (say 12-14 "points" counting distribution, or whatever your standard is), then a splinter is perfect. If you have a good hand, however, use 2NT. You can't allow splinters to include barely good enough for game hands and slam interest hands, or your bidding really will suffer.

Ben
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Posted 2004-April-15, 08:36

Flame, on Apr 14 2004, 05:23 PM, said:

KXXXXX
AX
AX
KQX

vs

AQXX
XX
XX
AJXXX

my bidding -
1sp - 2c
2sp - 3sp
4nt - 5sp == two aces + the Q of trump
7sp == counting to 13

now you show me how you bid this to 7sp after 2nt.
when you do that remember that partner can have

AQXX
QXX
QXX
AXX
when you can only take 11 tricks.
or can have

AQXX
KQX
QXXX
XX

again only 11 tricks here

sry for changing this post so many time, Ben you probebly seen another version of this.

On first example most won't bid J2NT with 11 count, my wk NT pd and I play 2NT as Inv or better. But the question was for J2NT, so I will bid 2, a slight overbid maybe but with my good fit and 2 aces, I'll try game. I bid 3, pd will bid 3, and I will bid 4. Pd RKC and asking specific Kings and we get to 7.

Now the 2nd example, pd will use J2NT, and I bid 3, showing no shortness or 2nd long suit and better then minimum hand. Now pd can see we have somewhat duplicate hands, since that's what I showed. He can now bid 3 NT, showing a balanced 4-3-3-3, and a decent hand. Conventions are nice but common sense you need otherwise you will not win in bridge.

3rd Hand, again J2NT, again 3 (same as above). This hand is better then 2nd hand, therefore pd might bid 4. I will bid RKC and end in 6. I will make 12 tricks. only have to ruff 1 .

Mike :D

P.S. you can search many many hands and eventually you might find a hand where your gambling pays off better then my bidding, but at that point I will be up about 1000 imps anyhow :lol:
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#20 User is offline   Trpltrbl 

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Posted 2004-April-15, 08:42

inquiry, on Apr 14 2004, 05:31 PM, said:

When I disagree with you I will tell you so... :-0, but FLAME is 100% right here, and the example hands illustrate the point nicely. Sorry mike, but this is clear.

Ben

You still agreeing 100% ?

Mike :lol:
“If there is dissatisfaction with the status quo, good. If there is ferment,
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