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To preempt or not to preempt, that is the question

#1 User is offline   whereagles 

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Posted 2008-March-19, 10:33

IMPs. Match status: swingy mood, but scores tied. Table: aggressive expert pard, cunning expert RHO, intermediate passive LHO.

Scoring: IMP

Pard RHO you
Pass 1 ..??

What number of spades do you bid? Or do you prefer dbl? :)

Note: a WJO by you at this stage need not be "weak". It's just a Robson/Segal style pressure-bid.
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#2 User is offline   pclayton 

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Posted 2008-March-19, 10:40

1. No need to get manic here regardless of my 'swingy' mood.
"Phil" on BBO
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#3 User is offline   kenrexford 

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Posted 2008-March-19, 10:49

I have not been happy with my prior decisions to blast 4 with this type of hand.
"Gibberish in, gibberish out. A trial judge, three sets of lawyers, and now three appellate judges cannot agree on what this law means. And we ask police officers, prosecutors, defense lawyers, and citizens to enforce or abide by it? The legislature continues to write unreadable statutes. Gibberish should not be enforced as law."

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#4 User is offline   dicklont 

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Posted 2008-March-19, 11:10

1
My aggressive partner will act if he has something to offer.

After (1) - 1 - (pass) 1NT/2/2 I will jump to 3.
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#5 User is offline   CSGibson 

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Posted 2008-March-19, 11:11

1, no problems thus far.
Chris Gibson
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#6 User is offline   mike777 

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Posted 2008-March-19, 11:16

4s
1s, second choice.
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#7 User is offline   helene_t 

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Posted 2008-March-19, 11:30

1. My preempts are getting less sick due to influence from this forum.
The world would be such a happy place, if only everyone played Acol :) --- TramTicket
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#8 User is offline   han 

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Posted 2008-March-19, 11:55

1S, Helene has convinced me to stop using sick preempts. I don't think 4S is very sick here btw. It's quite unlikely that you have slam and likely that they have a heart fit. However, If I can bid 1S now and 3S next then I'm happy.
Please note: I am interested in boring, bog standard, 2/1.

- hrothgar
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#9 User is offline   jdonn 

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Posted 2008-March-19, 12:11

han, on Mar 19 2008, 12:55 PM, said:

1S, Helene has convinced me to stop using sick preempts. I don't think 4S is very sick here btw. It's quite unlikely that you have slam and likely that they have a heart fit. However, If I can bid 1S now and 3S next then I'm happy.

I sort of agree, maybe I'm changing but I don't find 4 quite as sick as others might, although I still bid 1. Throw in the jack of spades and now it's close since then there is a lot more potential and a lot less danger if partner has a singleton there.
Please let me know about any questions or interest or bug reports about GIB.
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#10 User is offline   Apollo81 

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Posted 2008-March-19, 12:25

Just one.
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#11 User is offline   skjaeran 

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Posted 2008-March-19, 13:51

1 is appropriate here for me. 4 isn't totally sick - far from. Agree with Josh's last comment regarding adding the J.
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Harald
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#12 Guest_Jlall_*

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Posted 2008-March-19, 14:33

This is not the right hand for 4S, you have too much defense and too poor of a suit and too little offense.
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#13 User is offline   Cascade 

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Posted 2008-March-19, 14:58

This looks like either 1 or 4.

Either could work well or badly.

I tend not to bid 4 with hands this strong so have a leaning towards 1.

Actually in my partnership we have another option of 2 intermediate. But I think 14 good points and a seventh spade is too good for a 12-16 2.
Wayne Burrows

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#14 User is offline   effervesce 

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Posted 2008-March-19, 19:33

3rd seat, partner passed hand, I would not mind 4S. Unlikely to be what the rest of the field bids though. 1S at IMPs, 4S at MPs?
Ming

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#15 User is offline   Cascade 

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Posted 2008-March-19, 21:13

effervesce, on Mar 20 2008, 02:33 PM, said:

3rd seat, partner passed hand, I would not mind 4S. Unlikely to be what the rest of the field bids though. 1S at IMPs, 4S at MPs?

I am not convinced 4 is wrong but I am not sure why you would want to go anti-field so early in the hand at MPs.
Wayne Burrows

I believe that the USA currently hold only the World Championship For People Who Still Bid Like Your Auntie Gladys - dburn
dunno how to play 4 card majors - JLOGIC
True but I know Standard American and what better reason could I have for playing Precision? - Hideous Hog
Bidding is an estimation of probabilities SJ Simon

#16 User is offline   whereagles 

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Posted 2008-March-20, 05:42

I can't remember the hands exactly, but it was something like...

Scoring: IMP

North East South West
pass .. 1 ..??

I decided to bid 4, on grounds that it would shut opps out of the bidding and that it has a good chance to make. I was going for a bucketload, but East decided to bid 5!!! Now we slopped a trick and he ended "only" -500 down.

In case you're wondering, I ran a simulation for pard's hand. Constraints were:
- pard has 0-11 hcp
- RHO 5+ hearts, 11+ hcp

And results after 110 000 matching hands:

Pard: average of 2.1 spades and 6.35 hcp
Spade king: 26.6% in pard, 44.5% in RHO

4 is a statistical winner. Sure, you can always say you'd get there after a 1 overcall. Which is true... unless pard has 2 kings and passes 1 :ph34r:

By the way, I didn't took out of the simulation hands where pard would open 2x or 3x. If I had, the results would favour 4 even more.
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#17 User is offline   jdonn 

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Posted 2008-March-20, 09:50

whereagles, on Mar 20 2008, 06:42 AM, said:

By the way, I didn't took out of the simulation hands where pard would open 2x or 3x. If I had, the results would favour 4 even more.

If partner were barred from the bidding :)
Please let me know about any questions or interest or bug reports about GIB.
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#18 User is online   mikeh 

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Posted 2008-March-20, 10:08

whereagles, on Mar 20 2008, 06:42 AM, said:

In case you're wondering, I ran a simulation for pard's hand. Constraints were:
- pard has 0-11 hcp
- RHO 5+ hearts, 11+ hcp

And results after 110 000 matching hands:

Pard: average of 2.1 spades and 6.35 hcp
Spade king: 26.6% in pard, 44.5% in RHO

4 is a statistical winner.

If you mean that the simulation showed that 4 was a good contract... that getting to 4 was, if you got there everytime, better than not getting there, overall... then you may be correct, based on your simulation.

But if you interpreted your results, and intended your post, to say that a 4 overcall was a statistical winner, then I suspect that you are at the very least probably wrong.

You need to cater to several factors, of which the biggest two appear, to me, to be:

1. the number of the 110,000 hands on which your partnership would get to 4 by some other route...

2. the number of the 110,000 hands on which the immediate 4 gets you too high... when a 1 overcall would keep you safe. Your actual hand, against a decent pair, would go for a number.. and it is, as I know you know, a silly approach to rely upon the opponents being idiots.. yes, it allows you to do well in that field, but you will learn habits that get you killed when you play against better competition.

My suspicion is that the losses on the '4 is too high' hands will at least largely outweigh the gains from the 'we can't get there any other way' hands on which 4 wins. As for partner passing 1 when we can make game... last I heard, there was no rule that partner's pass barred rho or that, if rho reopens, we are not allowed to bid again. So while I fully accept that, on some of the hands where we make 4, we will miss it after an overcall at the one-level, I assuredly don' think that this will happen more than occasionally.
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#19 User is offline   whereagles 

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Posted 2008-March-20, 20:58

Well... instead of "suspecting" of me being right or wrong, why don't you calculate the standard deviation of pard's nr. of spades and hcps? If the SD is high, you're right. If it's low, you're wrong.
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#20 User is offline   mr1303 

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Posted 2008-March-21, 02:53

I was a 4S bidder, despite how it should have turned out.
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