BBO Discussion Forums: 3NT vs 4Hearts - BBO Discussion Forums

Jump to content

  • 2 Pages +
  • 1
  • 2
  • You cannot start a new topic
  • You cannot reply to this topic

3NT vs 4Hearts knowing partners shape how much does it change

Poll: your bid (21 member(s) have cast votes)

whats your choice

  1. 4 hearts (1 votes [4.76%])

    Percentage of vote: 4.76%

  2. 3 hearts (0 votes [0.00%])

    Percentage of vote: 0.00%

  3. 3NT (20 votes [95.24%])

    Percentage of vote: 95.24%

Vote Guests cannot vote

#21 User is offline   pigpenz 

  • PipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 2,553
  • Joined: 2005-April-25

Posted 2012-May-09, 17:45

View PostZelandakh, on 2012-May-08, 02:51, said:

I got my cases a bit mixed up in the previous post. So far we have

A: 3=4=3=3: 3NT 60%, 4 25%
B: 4 hearts, 2-5 all other suits: 3NT 25%, 4 63%
C: 4 hearts, 2-4 spades, 2-5 minors: 3NT X%, 4 2X% (for unknown X)
D: 4 hearts, 4-3-2 in the other 3 suits: ?
E: 4 hearts, 2 clubs, 3-4 other suits: ?

Case E is of particular interest to me here initially as it is the only one that specifically removes both the factor of a double fit and of a ruffing feature. If E is reasonably similar to A then D becomes very interesting too. Each of these hand types is essentially one step better for 3NT and worse for 4. What I am looking to see is how big the steps are between B:C:D:E:A. Somewhere along the way there is likely to be a large switch. From finding out where we can ascertain what the key features are to probe for on this particular hand. If we find that these features are a good metric on a large variety of hands then it might suggest a method for superaccepts in general.

the person I was playing with suggested this as their system since I was only playing in a 12 board bbo acbl match I sais well play this later, but they did suggest that a
bid at the 3 level showed 4 card support for transfer suit and a doubleton in the bid suit I believe. so with the question for D and E I would have to enter in those constraints, to me logically it would seem that on E if NT opener was 4432 or 3442 then 4 would be a better call.

and For C it was still basically 2:1 's over 3NT (63%:33%)
0

#22 User is offline   pigpenz 

  • PipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 2,553
  • Joined: 2005-April-25

Posted 2012-May-09, 17:52

on the first batch of hands I ran
where the NT opener had 3-4,4,3-4,2
449%
3NT 23%
that was only on 200 hands Ill bump it up to 1000 next
I was sort of suprised that it dropped that far though
0

#23 User is offline   wanoff 

  • PipPipPipPip
  • Group: Full Members
  • Posts: 354
  • Joined: 2012-February-25
  • Gender:Male
  • Location:Birmingham,UK

Posted 2012-May-10, 05:32

For those of us playing 2 as Baron or H, none of these apply. Partner has shown any min with H so now I can ask for a second suit with 3, retransfer, set the suit and slam try with 3, splinter, or signoff in 3NT or 4.
Of course with this hand it seems sensible to retransfer and offer a choice with 3NT.
1

#24 User is offline   TWO4BRIDGE 

  • PipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 2,247
  • Joined: 2010-October-21
  • Gender:Male
  • Location:Texas

Posted 2012-May-10, 06:45

@ pigpenz

2NT open ( 20, 21 ) .... will 3NT play better than 4M ?

I wonder what the simulation results might be for a 2NT open and a 3NT! ( 3 4 3 3 ) super-accept:

Responder Hand:
x x x
K Q J x x
J x x
x x

2NT - 3D!
3NT! - ??
Don Stenmark
TWOferBRIDGE
"imo by far in bridge the least understood concept is how to bid over a jump-shift
( 1M-1NT!-3m-?? )." ....Justin Lall

" Did someone mention relays? " .... Zelandakh

K-Rex to Mikeh : " Sometimes you drive me nuts " .
0

#25 User is offline   pigpenz 

  • PipPipPipPipPipPipPip
  • Group: Advanced Members
  • Posts: 2,553
  • Joined: 2005-April-25

Posted 2012-May-10, 10:46

View PostTWO4BRIDGE, on 2012-May-10, 06:45, said:

@ pigpenz

2NT open ( 20, 21 ) .... will 3NT play better than 4M ?

I wonder what the simulation results might be for a 2NT open and a 3NT! ( 3 4 3 3 ) super-accept:

Responder Hand:
x x x
K Q J x x
J x x
x x

2NT - 3D!
3NT! - ??

the simulations I got were 99% for both 4 and 3NT on the above question
0

  • 2 Pages +
  • 1
  • 2
  • You cannot start a new topic
  • You cannot reply to this topic

1 User(s) are reading this topic
0 members, 1 guests, 0 anonymous users