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: 2,554
  • 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: 2,554
  • 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
4♥49%
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: 2,554
  • 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