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question about UDCA

#21 User is offline   ArtK78 

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Posted 2012-January-19, 10:03

View Postdake50, on 2012-January-19, 02:27, said:

Are we two decades into UDCA and these questions
are not answered? I've heard UDCA is best but, as
here, without justification. I hope your post
generates the "why it's best?"
Another case is UDCA vs. unblocking problems that
were easy when Std signals were used - high signaled
attitude while unblocking.

This is an argument that I don't understand.

If one was playing standard carding, what card would one play?

To me, the question is "Is this an attitude or count situation?" I believe it is an attitude situation, and I don't want partner to continue clubs, so (playing UDCA) I play the highest one that I can afford to play - the 7. If I were playing standard carding, it would still be an attitude situation, so I would play the 2.

There are many reasons why UDCA is superior to standard carding. The most obvious is when you discourage, the high card that you use to discourage is likely to be a card you can afford to play; however, if you were playing standard carding, a high card that you would have to play to encourage might not be a card you could afford to play.

As for unblocking plays, they tend to be obvious to all concerned.
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#22 User is offline   bluecalm 

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Posted 2012-January-19, 10:11

Quote

I agree with this 100%. It is fine for experts to have agreements to give the signal partner wants to see but for B/I/As it is just not reliable enough that you are both going to know what the right signal is


Yes, that's why I posted it in this forum because again I am not interested in what is practica in B/I/As or pickup partnership. I am interested in what the best agreement is in situations where:
a)we give count
b)distinguishing between xx and xxxx might be both difficult and important (which for example isn't the case after high preempts or 2suiter openers, where playing the lowest card is almost always readable)

Quote

You can get a long way with a simple att->ct->sp in our suits and ct->sp in declarer's suits


i agree with that 100%.
Again, I the thread is about what the best agreement is and not what is practical in pickup/non serious partnerships.

Quote

With standard count you play a high card for an even number and a low card for an odd number.


Interesting. I was under impression that most players who use standard carding give even count with 2nd best. Am I incorrect here ?

Quote

Therefore if this is a count situation for you then the lowest card is correct.


I feel I need a break from posting because I easily get annoyed lately but your reasoning is just incorrect.
It's not "therefore", it's only correct to play the lowest if that card allows you to solve the most situations at the table. This may well be the case or it might not be. Some great players I know, play 2nd from xxxx in those situations, others play low. I don't know the answer to the question which agreement is better so I make this thread here.
I don't want to sound mean but what about thinking about this problem for a bit instead of giving generic, not suitable for this thread advice about what is practical in casual play when you don't have specific agreements.

This forum sadly lacks discussion about signalling which world class pairs use. Most threads about the matter are reduced to generic advice for I/A players. I try to dig a bit deeper here and discuss the best way of playing, please don't reduce that discussion to something it wasn't intended to be.


Quote

I believe it is an attitude situation, and I don't want partner to continue clubs,


All is nice except you want partner to continue clubs. In fact if you were to guess which is the best line of defense at this point it would clearly be to try to cash another club because if partner switch to say diamonds, the club loser will disappear on hearts, as we don't hold the queen.
The only problem is that you don't want partner to continue clubs if declarer has stiff in the suit but you really really want him to continue clubs if declarer is xx.
Now, how do we work that one out to give us the biggest chance of getting it right ?
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#23 User is offline   rhm 

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Posted 2012-January-19, 13:25

View Postbluecalm, on 2012-January-19, 10:11, said:

View PostArtK78, on 2012-January-19, 10:03, said:

I believe it is an attitude situation, and I don't want partner to continue clubs


All is nice except you want partner to continue clubs. In fact if you were to guess which is the best line of defense at this point it would clearly be to try to cash another club because if partner switch to say diamonds, the club loser will disappear on hearts, as we don't hold the queen.
The only problem is that you don't want partner to continue clubs if declarer has stiff in the suit but you really really want him to continue clubs if declarer is xx.
Now, how do we work that one out to give us the biggest chance of getting it right ?

This is why I play attitude only under circumstances, where they tend to be useful.
I have never really understood why at trick one third hand should be in a much better position to direct the defense, while poor leader apparently has no clue.
When it does not work you get the typical bla-bla-bla "that signals are only a suggestions".

Count signals had never such a claim. They pass information not suggestions and each defender decides based on the information available to him/herself what is best.

Look at this simple example: Most want to discourage. Bluecalm wants to encourage except when declarer has a singleton. I prefer giving count and let opening leader decide what to do next.

Rainer Herrmann
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#24 User is offline   FrancesHinden 

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Posted 2012-January-19, 15:13

The reason you are getting frustrated is that you are not being clear about the question


View Postbluecalm, on 2012-January-18, 15:22, said:

What cards do you play here playing udca ?In general, which card do you play from xxxx when partner leads the ace and the smallest one might be ambigious (difficult for partner to decide if we have xx or xxxx). I play udca all my life but nobody ever gave good argument to convince me which is the proper card and it seems people prefer various ways (smallest, 2nd, 3rd).


first of all you just say 'what card do you play'

View Postbluecalm, on 2012-January-18, 18:28, said:

We don't play that. Anyway the problem is only about how to signal count from xxxx.


now you say the problem is specifically how to give count

View Postbluecalm, on 2012-January-19, 03:00, said:

The question is what is the best agreement to maximize information. C'mon guys, it's not simple question and you are treating this problem like it was someone who just learnt bridge asking about what low card mean: "read a book", "signal in tempo", "don't confuse partner", "I don't like clubs so I play high" etc. I mean it is difficult question about best agreements and not what to do in practice playing in pickup partnership.


now you say it's a question about what the best agreements are


View Postbluecalm, on 2012-January-19, 07:38, said:

Yes, A from AK and that's it. We generally give attitude but in situations where count is clearly (!) useful we give count.


Now you say your agreement is attitude unless count is clearly useful, but you are also telling us that you must give count here


View Postbluecalm, on 2012-January-19, 10:11, said:

I am interested in what the best agreement is in situations where:a)we give countb)distinguishing between xx and xxxx might be both difficult and important (which for example isn't the case after high preempts or 2suiter openers, where playing the lowest card is almost always readable)i agree with that 100%.


and now you say that you want to discuss how to distinguish specifically between xx and xxxx as a general question, not what the right signal is on the hand you started with


....and to anyone who disagrees with your agreement (attitude unless count is clearly useful) you seem to be objecting that they aren't answering your question.

So what are you asking:

- How do top class players who play 'attitude unless count is clearly useful' manage in this sort of position?
or
- What do top class players do?
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#25 User is offline   FrancesHinden 

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Posted 2012-January-19, 15:16

View Postbluecalm, on 2012-January-19, 10:11, said:

Interesting. I was under impression that most players who use standard carding give even count with 2nd best. Am I incorrect here ?


I don't know what 'most' players do.
We play standard count and we give even count with our highest card and odd count with our lowest. If we get that far and the difference is still important we continue with our lowest/highest card, but with length in the suit it's more likely to be suit preference by then.
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#26 User is offline   FrancesHinden 

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Posted 2012-January-19, 15:31

View Postbluecalm, on 2012-January-19, 03:00, said:

Well, we really want partner to play another high club if declarer isn't ruffing because he will discard a club on a heart we can ruff but this is at the cost of our natural trump trick.
So partner really needs to read club count here. I think situations like that are frequent. I also prefer to play "just attitude, low = play two more rounds o clubs, high = don't do it" but here it should clear that cashing a club is vital play if declarer has more than one.
I mean it is difficult question about best agreements and not what to do in practice playing in pickup partnership.


I think you are getting the answer about 'best agreements', which is that no-one replying to this thread plays 'attitude unless partner wants count'
You can see two trump tricks, and you know partner needs to cash out. However, partner doesn't know that. Suppose partner's hand is

xx
xxxx
KJxx
AKJ


From his point of view, declarer could have either

AQJ109x
Qxx
xx
xx

(when a diamond switch is necessary to beat the contract)

or

AKQ10xx
x
xx
10xxx

(when it's necessary to give you a club ruff)


I'm not going to comment on whether or not we are a 'top partnership' but we spend a lot of time discussing signalling (and I mean about as much as we do discussing uncontested auctions), and the one thing we don't do is play any form of 'attitude unless partner wants count'; we stick to an agreement about when we give attitude and when we give count (and when we give suit preference) based on objective rules. In fact most of our discussions lately are about (i) suit preference vs attitude positions late in the play and (ii) when a switch should be attitude and when it should be count. (Although JLOGIC's thread on 3NT spawned a long discussion about whether to give or attitude at trick one when dummy has Kx defending 3NT, which we still haven't resolved.)
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#27 User is offline   CSGibson 

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Posted 2012-January-19, 15:45

My own agreements solve this particular problem, though it does have problems in other situations.

In my partnership, we lead high from an even number, and Rusinow from an odd number. Here, the lead of an ace would indicate a 2 or 4 card suit, and I'm going to play my highest club to discourage partner from trying to cash another from a 4 card suit.

In general, if you play this as a count situation, you should play your lowest card from 4 and the highest card you can afford from 3. Playing the 3 would deny the 2 for me from an even number, and my partner would be sure to play me for a doubleton; likewise, if I had 3, playing the 6 would deny the 7 if I had an odd number.

If it is an attitude situation, play the highest you can afford if you want to discourage, and the lowest you can afford to encourage.

We would play this as an attitude situation (with obvious shift implications), but that's an area of partnership agreement, so I don't imagine there is going to be a useful consensus.
Chris Gibson
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#28 User is offline   bluecalm 

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Posted 2012-January-19, 15:48

Quote

I'm not going to comment on whether or not we are a 'top partnership' but we spend a lot of time discussing signalling (and I mean about as much as we do discussing uncontested auctions)


So do you play attitude or count here ?
We discussed it and generic rule for us seems to be "if declarer showed a lot of cards in side suits in the bidding then we give count, otherwise attitude". This for sure apply after 3level preempts and 2 suiter openers. I am not sure about 2level openings.
Do you care to share your thoughts on this exact situation ? (I mean, what signal would you give here ?)
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#29 User is offline   FrancesHinden 

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Posted 2012-January-19, 16:00

As a general rule, if partner led the ace I would give attitude and hence would discourage. Partner will at least be aware of the potential for us to have two trump tricks and hence the need to cash out.
If I could work out that it must be right for partner to continue clubs, of course I would encourage, but everyone plays that if you know how to direct the defence, then you do so.

I don't have a signal to say 'please continue clubs if you have only 3 but switch if you have 4'
Although I would expect partner to be more likely to lead the king, asking for count, from AKJ10 or AKJx, so perhaps I would gamble on partner having only 3 of them and encourage.
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#30 User is offline   gnasher 

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Posted 2012-January-19, 16:35

I normally play that the ace asks for atttude, but if dummy has Qxx(x) we switch to count. On this deal, therefore, I'd show an even number and hope partner could work it out.


As I understand it, one of the things you want to be able to do is to make a three-way distinction between xx, xxx and xxxx. You can only do this by sacrificing some certainty compared with a binary signal, but it may be worth it.

Suppose, for example, that you agreed to signal xX, Xxx, xxXx. If declarer hid a low spot card, he could make xxx look like xxxx, or xx look like xxxx. By playing a low spot card, he could make xxxx look more like xx. However, one advantage to these signals is that it's quite hard for declarer to work out what the correct card to play is, as it seems to depend on how many cards you're trying to show.
... that would still not be conclusive proof, before someone wants to explain that to me as well as if I was a 5 year-old. - gwnn
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#31 User is offline   bluecalm 

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Posted 2012-January-19, 18:44

Quote

Suppose, for example, that you agreed to signal xX, Xxx, xxXx. If declarer hid a low spot card, he could make xxx look like xxxx, or xx look like xxxx. By playing a low spot card, he could make xxxx look more like xx. However, one advantage to these signals is that it's quite hard for declarer to work out what the correct card to play is, as it seems to depend on how many cards you're trying to show.


Yeah, this is exactly my point.
Maybe for example xXxx, Xxx, xX is more readable in most situations than xxxX, Xxx, xX. I was hoping someone could offer some insight/analysis of that because I don't really know how to start thinking about it to arrive at some useful conclusions.
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#32 User is offline   Tomi2 

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Posted 2012-January-19, 19:33

I play count singlas in nearly every spot and UDCA and obviously i play the smallest here. partner can read this as two or 4, no agreement is perfect. but once i play a small spot but not the smallest one he knows i have two cards only. if i play a relatively high one he must find out if its Xxx or xX and if I play the highest one he knows its 3 cards. I really hate "encouraging" with two small. if partner has the count on the hand he should be able to work out, If I get a ruff. I can't imagine playing the same card from xxx and xxxx and sometimes "falsecard" from xx to make partner find a switch. and on the other hand to play the same card from xx Qxx qxxx etc.

the xx xxxx problem gets solved a bit in the next round if partner decides to cash the king, i play my next lowest spot. so anytime i have not played the two lowest spots i have started with a doubleton. so 23 sec and 98 sec are kinda the most difficult holding for this method regarding the correct count
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#33 User is offline   dake50 

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Posted 2012-January-19, 21:23

This is an argument that I don't understand.

If one was playing standard carding, what card would one play?

To me, the question is "Is this an attitude or count situation?" I believe it is an attitude situation, and I don't want partner to continue clubs, so (playing UDCA) I play the highest one that I can afford to play - the 7. If I were playing standard carding, it would still be an attitude situation, so I would play the 2.

There are many reasons why UDCA is superior to standard carding. The most obvious is when you discourage, the high card that you use to discourage is likely to be a card you can afford to play; however, if you were playing standard carding, a high card that you would have to play to encourage might not be a card you could afford to play.

As for unblocking plays, they tend to be obvious to all concerned.


*** Can this discussion even exist if this 20 year old
*** "UDCA is best" were correct and documented/demonstrated?
*** If it's best these were shown better long ago.
*** This situation would long ago have been resolved in "UDCA is best".
*** That hasn't happened. This discussion is asking "what is best?"
*** UDCA proponents are, by me, simply asked to show.
*** Not appeal to experts do it. Not 10x drops 10 to discourage.
*** Not one pet case, but a spectrum of better than.
*** I haven't seen that. Show me.
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#34 User is offline   bluecalm 

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Posted 2012-January-20, 03:54

One example of agreement of this kind:
When you are discarding and want to encourage from Hxxxx we play 4th, not 5th. This way partner instantly knows when we have Hxxx if he sees the lowest spot and from 5 count will often clear too quite fast.
So while it is attitude situation for us, we don't play the lowest to encourage from every holding.
It seems the idea is completely alien to some people here :)

Quote

the xx xxxx problem gets solved a bit in the next round if partner decides to cash the king, i play my next lowest spot. so anytime i have not played the two lowest spots i have started with a doubleton. so 23 sec and 98 sec are kinda the most difficult holding for this method regarding the correct count


Yeah, I think it's quite reasonable agreement. I have know idea if it's best though, it well might be. At least it' doesn't require much mental effort to analyze possible spot holdings.
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#35 User is offline   fluff 

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Posted 2013-March-23, 08:45

We play UDCA but with some exceptions, as recommended by Kit Woolsey. So, after partner leads A from AK and there is a threat in dummy, Qxx(x) or singleton, third hand plays suit preference.

so here we would play the lowest club, inviting partner to switch diamond.
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#36 User is offline   bluecalm 

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Posted 2013-March-23, 10:13

Quote

So, after partner leads A from AK and there is a threat in dummy, Qxx(x) or singleton, third hand plays suit preference.


So how do you manage to ruff a club if opening leader has AKxx and declarer xxx ?
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#37 User is offline   TWO4BRIDGE 

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Posted 2013-March-23, 13:42

View Postfluff, on 2013-March-23, 08:45, said:

We play UDCA but with some exceptions, as recommended by Kit Woolsey. So, after partner leads A from AK and there is a threat in dummy, Qxx(x) or singleton, third hand plays suit preference.

So, here we would play the lowest club, inviting partner to switch diamond.


If Attitude and Count are unnecessary ( as understood from your explanation above ), then it doesn't matter if you are playing UDCA or Standard to give Suit Preference-- it would be the same card signal.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
As for OP's original question, there is NO way to distinguish between 2 or 4 cards ( if you are giving Count ) on the 1st lead when You and Dummy both have 4 cards each and you don't know if partner is leading from 4 cards. [ This has been stated earlier ] .

EDIT: not only has this same question been asked over and over on these forums for the past 10+ years, it also has been asked -- and not resolved -- on at least another message board ( according to my files ) .

This post has been edited by TWO4BRIDGE: 2013-March-23, 13:55

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#38 User is offline   jogs 

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Posted 2013-March-23, 16:23

View Postmikeh, on 2012-January-18, 16:05, said:

As far as I know, no-one has invented a legal method of telling partner whether you have xx or xxxx, regardless of signalling agreements.

In real life, some players will inadvertently or deliberately 'help' partner by hestitating with 4 and playing quickly with 2.



I solved that problem years ago. Behind dummy always wait at least 30 seconds
(after dummy is shown) before playing to trick one. Wait the 30 seconds even
when you hold a singleton in the suit.
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#39 User is offline   DougN 

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Posted 2013-April-12, 00:25

View Postdake50, on 2012-January-19, 21:23, said:



There are many reasons why UDCA is superior to standard carding.

Partner leads the A (or K if you prefer), what card do
you play if UDCA is agreed?

.........765
AK84.........J102
.........Q93

Is there a similar counterexample for natural count and attitude
where you have a card suitable for both signals (ie not J109 or J32)?
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#40 User is offline   Cascade 

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Posted 2013-April-12, 04:00

View Postjogs, on 2013-March-23, 16:23, said:

I solved that problem years ago. Behind dummy always wait at least 30 seconds
(after dummy is shown) before playing to trick one. Wait the 30 seconds even
when you hold a singleton in the suit.


This seems illegal to me and is likely to deceive a declarer who does not know of your habit and you could have known that was the case so I would hope that you would be ruled against when declarer is deceived.
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