BBO Discussion Forums: 2NT strong, natural and forcing - BBO Discussion Forums

Jump to content

Page 1 of 1
  • You cannot start a new topic
  • You cannot reply to this topic

2NT strong, natural and forcing Under EBU rules

#1 User is offline   blackshoe 

  • PipPipPipPipPipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 17,693
  • Joined: 2006-April-17
  • Gender:Male
  • Location:Rochester, NY

Posted 2012-July-31, 15:13

I was just looking at the latest OB, and I noticed this definition of "natural":

Quote

A bid of no trumps which shows a preparedness to play in no trumps, and which conveys no unusual information about suit holdings [is natural]; it must not be forcing unless a forcing auction has already been created. Note that certain ostensibly natural no trump bids are permitted to allow a singleton by agreement.

Romex uses a natural 2NT opening, in that it "shows a preparedness to play in no trumps" and is balanced (5332, 4432, 4333, may include any five card suit, rarely may include a singleton ace or king). However, it also shows 25-26 HCP and 9 controls (and the point range may be as low as 24 with 9 or more controls, or as high as 27 with 9 or fewer controls). Because it shows game values, it is forcing to game. Does this latter provision mean that in the EBU this opening bid is considered artificial (which is defined as "not natural")?

It doesn't really matter to me, since I don't play there any more, it just seems odd that an ostensibly natural bid should be considered artificial just because it's forcing. :unsure:

Additional question: at what level is this opening allowed? Looks to me like Level 2 ("Any strong meaning(s)").
--------------------
As for tv, screw it. You aren't missing anything. -- Ken Berg
I have come to realise it is futile to expect or hope a regular club game will be run in accordance with the laws. -- Jillybean
0

#2 User is offline   lalldonn 

  • PipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 1,066
  • Joined: 2012-March-06

Posted 2012-July-31, 15:24

For a more common example, is that saying 1 p 2NT is not natural if it's forcing to game? How goofy lol.
"What's the big rebid problem? After 1♦ - 1♠, I can rebid 1NT, 2♠, or 2♦."
- billw55
1

#3 User is offline   gnasher 

  • Andy Bowles
  • PipPipPipPipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 11,993
  • Joined: 2007-May-03
  • Gender:Male
  • Location:London, UK

Posted 2012-July-31, 16:23

You missed out a key sentence: "The following are considered ‘natural’ for alerting purposes:" That is, the rule you quote defines the word "natural" solely for the purposes of the alerting rules. The authors of the Orange Book could have chosen any word for the category of bid that they were trying to define. They chose "natural" as a reasonable, albeit imperfect, approximation.

If you prefer, you can substitute the word "banana" for "natural" throughout section 5 of the Orange Book. For example:

Unless it is announceable (see 5 C and 5 D), a pass or bid must be alerted if
(a) it is not banana; or
(b) it is banana but has a potentially unexpected meaning.
...

The following are considered ‘banana’ for alerting purposes:

...
(b) A bid of no trumps which shows a preparedness to play in no trumps, and which conveys no unusual information about suit holdings; it must not be forcing unless a forcing auction has already been created. Note that certain ostensibly banana no trump bids are permitted to allow a shortage by agreement.
...
Because they are not banana, players must alert:
(a) An opening bid of one of a suit in which opener may hold fewer than three cards.
...


Would that make you happier?
... 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
1

#4 User is offline   gnasher 

  • Andy Bowles
  • PipPipPipPipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 11,993
  • Joined: 2007-May-03
  • Gender:Male
  • Location:London, UK

Posted 2012-July-31, 16:25

View Postlalldonn, on 2012-July-31, 15:24, said:

For a more common example, is that saying 1 p 2NT is not natural if it's forcing to game? How goofy lol.


No, it's saying that for alerting purposes 1 p 2NT(F) falls into a different category from 1 p 2NT(NF).
... 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
0

#5 User is offline   blackshoe 

  • PipPipPipPipPipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 17,693
  • Joined: 2006-April-17
  • Gender:Male
  • Location:Rochester, NY

Posted 2012-July-31, 19:15

View Postgnasher, on 2012-July-31, 16:23, said:

You missed out a key sentence: "The following are considered ‘natural’ for alerting purposes:" That is, the rule you quote defines the word "natural" solely for the purposes of the alerting rules. The authors of the Orange Book could have chosen any word for the category of bid that they were trying to define. They chose "natural" as a reasonable, albeit imperfect, approximation.

Fair enough.

View Postgnasher, on 2012-July-31, 16:23, said:

Would that make you happier?

My happiness is not at issue here. And the whole "banana" business is more than a little insulting. :angry:
--------------------
As for tv, screw it. You aren't missing anything. -- Ken Berg
I have come to realise it is futile to expect or hope a regular club game will be run in accordance with the laws. -- Jillybean
0

#6 User is offline   stevenagy 

  • PipPip
  • Group: Members
  • Posts: 23
  • Joined: 2012-April-09
  • Gender:Male
  • Location:Oregon, USA

Posted 2012-July-31, 19:31

View Postgnasher, on 2012-July-31, 16:23, said:

Would that make you happier?


It sure made me smile just now.
2

#7 User is offline   gnasher 

  • Andy Bowles
  • PipPipPipPipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 11,993
  • Joined: 2007-May-03
  • Gender:Male
  • Location:London, UK

Posted 2012-August-01, 00:22

The ACBL's approach folllows the same pattern: they define the term "natural" solely in order to categorise bids for alerting, even though the definition wouldn't make sense in other contexts. For example, in a different context it would be illogical to say that a 3-card 1 opening is natural but a 5-card 3 opening is not.
... 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
0

#8 User is offline   Zelandakh 

  • PipPipPipPipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 10,696
  • Joined: 2006-May-18
  • Gender:Not Telling

Posted 2012-August-01, 07:20

It sounds like 5NT in the auction 1NT - 5NT is alertable too. I would be willing to bet a coke that practically noone knows this. It is an interesting thought experiement to ponder what the non-alertable meaning might be.
(-: Zel :-)
0

#9 User is offline   iviehoff 

  • PipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 1,165
  • Joined: 2009-July-15

Posted 2012-August-01, 07:28

View PostZelandakh, on 2012-August-01, 07:20, said:

It sounds like 5NT in the auction 1NT - 5NT is alertable too. I would be willing to bet a coke that practically noone knows this. It is an interesting thought experiement to ponder what the non-alertable meaning might be.

If you are talking about England like OP, then in England it is not alertable regardless of its meaning, and everyone knows this. Because the basic rule "don't alert anything above 3NT" is easy to understand and well known, even though actually it is a bit more complicated than that, and the exceptions are less well known.
1

#10 User is offline   Zelandakh 

  • PipPipPipPipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 10,696
  • Joined: 2006-May-18
  • Gender:Not Telling

Posted 2012-August-01, 07:53

You are right, sorry. I thought that responses were also alertable but either the rules changed or I have gotten mixed up with ACBL or DBV rules, or something. The exceptions listed in the Orange Book seem pretty clear: artificial opening bids; lead-directing passes; and lead-directing doubles and redoubles suggesting a lead in a suit other than the one bid.

Having now read some more, I can think of one common case which creates a bit of confusion. After 1X - 1Y, it would not be uncommon to play a 2NT rebid as 18-19. Say we play very traditionally/conservatively, strictly a decent 6 points to respond; now 2NT is functionally forcing to game providing partner has their bid so it ssounds like it would be alertable. But if we systemically respond on weaker hands then now the exact same meaning for 2NT is non-alertable. Have I read that right this time? It surely is not intentional.
(-: Zel :-)
0

#11 User is offline   WellSpyder 

  • PipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 1,627
  • Joined: 2009-November-30
  • Location:Oxfordshire, England

Posted 2012-August-01, 08:13

View PostZelandakh, on 2012-August-01, 07:53, said:

Having now read some more, I can think of one common case which creates a bit of confusion. After 1X - 1Y, it would not be uncommon to play a 2NT rebid as 18-19. Say we play very traditionally/conservatively, strictly a decent 6 points to respond; now 2NT is functionally forcing to game providing partner has their bid so it ssounds like it would be alertable. But if we systemically respond on weaker hands then now the exact same meaning for 2NT is non-alertable. Have I read that right this time? It surely is not intentional.

Seems reasonable to me that 2N here should be alertable if it is forcing, and not alertable if it is non-forcing, regardless of exactly what aspects of our agreements lead to it being F in one case and not in the other.
2

#12 User is offline   lalldonn 

  • PipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 1,066
  • Joined: 2012-March-06

Posted 2012-August-01, 08:15

View Postblackshoe, on 2012-July-31, 19:15, said:

My happiness is not at issue here. And the whole "banana" business is more than a little insulting. :angry:


Really? Why? It cleared up the whole thing for me.
"What's the big rebid problem? After 1♦ - 1♠, I can rebid 1NT, 2♠, or 2♦."
- billw55
1

#13 User is offline   bluejak 

  • PipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 4,686
  • Joined: 2007-August-23
  • Gender:Male
  • Location:Liverpool, UK
  • Interests:Bridge Laws, Cats, Railways, Transport timetables

Posted 2012-August-01, 08:40

View PostZelandakh, on 2012-August-01, 07:20, said:

It sounds like 5NT in the auction 1NT - 5NT is alertable too. I would be willing to bet a coke that practically noone knows this. It is an interesting thought experiement to ponder what the non-alertable meaning might be.

Funnily enough, I know a number of poor players who think it means bid 6NT with a maximum, pass with a minimum.

Why do they not bid 4NT? Because 4NT is Blackwood, of course.
David Stevenson

Merseyside England UK
EBL TD
Currently at home
Visiting IBLF from time to time
<webjak666@gmail.com>
0

#14 User is offline   Zelandakh 

  • PipPipPipPipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 10,696
  • Joined: 2006-May-18
  • Gender:Not Telling

Posted 2012-August-01, 08:42

I thought all poor players played Gerber! Surely 4NT there is RKCB...
(-: Zel :-)
0

#15 User is offline   jallerton 

  • PipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 1,796
  • Joined: 2008-September-12
  • Gender:Male

Posted 2012-August-01, 15:57

View Postgnasher, on 2012-July-31, 16:23, said:

You missed out a key sentence: "The following are considered ‘natural’ for alerting purposes:" That is, the rule you quote defines the word "natural" solely for the purposes of the alerting rules. The authors of the Orange Book could have chosen any word for the category of bid that they were trying to define. They chose "natural" as a reasonable, albeit imperfect, approximation.

If you prefer, you can substitute the word "banana" for "natural" throughout section 5 of the Orange Book. For example:

Unless it is announceable (see 5 C and 5 D), a pass or bid must be alerted if
(a) it is not banana; or
(b) it is banana but has a potentially unexpected meaning.
...

The following are considered ‘banana’ for alerting purposes:

...
(b) A bid of no trumps which shows a preparedness to play in no trumps, and which conveys no unusual information about suit holdings; it must not be forcing unless a forcing auction has already been created. Note that certain ostensibly banana no trump bids are permitted to allow a shortage by agreement.
...
Because they are not banana, players must alert:
(a) An opening bid of one of a suit in which opener may hold fewer than three cards.
...


Would that make you happier?


No, because it would lay us open to the accusation that our alerting regulations are simply bananas.
2

#16 User is offline   blackshoe 

  • PipPipPipPipPipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 17,693
  • Joined: 2006-April-17
  • Gender:Male
  • Location:Rochester, NY

Posted 2012-August-01, 16:17

View Postjallerton, on 2012-August-01, 15:57, said:

No, because it would lay us open to the accusation that our alerting regulations are simply bananas.

ROFL! :lol: :lol: :lol:
--------------------
As for tv, screw it. You aren't missing anything. -- Ken Berg
I have come to realise it is futile to expect or hope a regular club game will be run in accordance with the laws. -- Jillybean
0

#17 User is offline   Jeremy69A 

  • PipPipPipPip
  • Group: Full Members
  • Posts: 137
  • Joined: 2010-October-20
  • Gender:Male
  • Location:London, United Kingdom

Posted 2012-August-04, 03:27

Oranges would be a better choice of fruit IMO.
1

Page 1 of 1
  • You cannot start a new topic
  • You cannot reply to this topic

6 User(s) are reading this topic
0 members, 6 guests, 0 anonymous users