Wednesday, June 1, 2011

Responses to a Mini (Kamikaze)NT 10-12 hcp

1.1.       Responses to 10-12 1N without interference

 
 
Mini NT is opened in 1st or 2nd seat NV only. For obvious reasons it’s not safe to open a mini NT vul, However; it’s also not safe to open in 3rd or 4th seat as your partner is likely to have less than 10 pts., possibly a lot less in my version of Precision. Our goal is to provide a relatively simple system that can be used over a mini NT and does not involve transfers. This has to be simple as we already have to remember a system over a medium NT that is also partially used over 1N rebids.
 
Pass:    0-12 HCP some hands are better than other, therefore would not pass all 12 HCP hands
2♣:       non-forcing Stayman. Garbage Stayman is not used so opener may cooperate in penalizing interference over 2♣.
2¨:       forcing Stayman
2©/2♠:  weak sign-off
2N:       Invitational 13-14 pts
3♣/3¨:  Preemptive 6+ card minor
3©/3♠:  Preemptive 6+ card major
3N:       sign-off to play
4♣:       Gerber
4¨:       asks for exact pt. count, 4©=10, 4♠=11, 4N=12
4©/4♠:  sign-off to play
 
Bidding after 2♣ non-forcing Stayman
2¨:       denies a 4 card major
2©/2♠:  Invitational 5 card suit, may have 4 in other major
2N:       Invitational
3♣/3¨:  Invitational with 5 card suit may have a 4 card major possibly with 6+ card minor
3©/3♠:  GF with 5 in bid major and 4 in other major
3N:       sign-off to play
4♣:       GF 0-1 5-5 or better in minors
            4         3-3 in minors
            4        good fit for ♣
            4♠         good fit for ♠
            4N        4-4 in minors
better minor with poor fit for slam
4:        GF 0-1♠ 5-5 or better in minors
            4        good fit for ♣
            4♠         good fit for ♠
            4N        4-4 in minors
better minor with poor fit for slam
4©/4♠:  sign-off to play likely 6-4 hand and was investigating with no slam ambitions
2©:       4 hearts, may have 4 spades
2♠:        Invitational 5 card suit
2N:       Invitational has 4 spades
3♣/3¨:  Invitational with 5 card suit may have a 4 spades possibly with 6+ card minor
3©:       invitational
3♠:        no meaning
3N:       sign-off to play has 4 spades
4♣:       GF 0-1♥ 5-5 or better in minors, with same methods as after a 2 response
4:        GF 0-1♠ 5-5 or better in minors, with same methods as after a 2♦ response
4©:       sign-off to play
2♠:        4 spades, denies 4 hearts
2N:       Invitational has 4 hearts
3♣/3¨:  Invitational with 5 card suit may have a 4 hearts possibly with 6+ card minor
3©:       invitational 5 card suit
3♠:        invitational
3N:       sign-off to play has 4 spades
4♣:       GF 0-1 5-5 or better in minors, with same methods as after a 2 response
4:        GF 0-1♠ 5-5 or better in minors, with same methods as after a 2 response
4♠= sign-off to play
 
Bidding after 2¨ forcing Stayman. Below is a useful link to a forcing where you often can get exact distribution and also show 5 card majors
http://members.shaw.ca/conventions/2D%20Stayman.htm
 
2©:       4 hearts may have 4 spades
2♠:        GF 5+ spades
2N:       asks for 4 card suit, this may be prelude to a hand with 5m
with no 4 card suit bid 3© with min. and 3N with max.
3♣/3¨:  GF 6+ minor
3©:       GF 4+ hearts
3♠:        no meaning
3N:       sign-off to play
4♣:       Gerber
4¨:       asks for exact pt. count, 4©=10, 4♠=11, 4N=12
4©:       sign-off to play
2♠:        4 spades denies 4 hearts
2N:       asks for 4 card suit, with none bid 3♠ with min. and 3N with max.
3♣/3¨:  GF 6+ minor
3©:       GF 5+ hearts
3♠:        GF 4+ spades.
3N:       sign-off to play
4♣:       Gerber
4¨:       asks for exact pt. count, 4©=10, 4♠=11, 4N=12
4♠:        sign-off to play
2N:       denies a 4 card major might have a 5 card minor
3♣/3¨:  GF 5+ card minor, here stoppers are bid, not necessarily controls for possible 3N
3©/3♠:  GF 5+ card major
3N:       sign-off to play
4♣:       Gerber
4¨:       asks for exact pt. count, 4©=10, 4♠=11, 4N=12

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