Difference between revisions of "User:Brian/Bridge/Responding to a 1NT opening"

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==Without interference==
 
==Without interference==
−
===With minimal strength===
+
{|class="wikitable"
−
I have one 5+-card major → [[#Jacoby transfer|Transfer]] to the major.
+
|+Responding with minimal strength (8− HCP)
 +
! If... !! then...
 +
|-
 +
| I have one 5+-card major
 +
| [[#Jacoby transfer|Transfer]] to the major.
 
* If partner accepts by bidding 2 of the major (the most common case), pass.
 
* If partner accepts by bidding 2 of the major (the most common case), pass.
 
* If partner superaccepts by bidding 3 of the major, re-evaluate your hand given the fit. You can either pass or, if your combined hands are now game-going, raise to the 4 level.
 
* If partner superaccepts by bidding 3 of the major, re-evaluate your hand given the fit. You can either pass or, if your combined hands are now game-going, raise to the 4 level.
 +
|-
 +
| I have 5+ cards in both majors
 +
| Transfer to the better of your two majors using the above procedure, then pass.
 +
|-
 +
| Otherwise
 +
| Pass.
 +
|}
  
−
I have 5+ cards in both majors → Transfer to the better major using the above procedure, then pass.
+
{|class="wikitable"
−
 
+
|+Responding with invitational strength (9 HCP)
−
Otherwise → Pass.
+
! If... !! then...
−
 
+
|-
−
===With invitational strength===
+
| I have a 6+-card major
−
I have a 6+-card major → Transfer to the major.
+
| Transfer to the major.
 
* If partner accepts normally, rebid 3 of the major to invite. Partner will either pass or sign off by raising to the 4 level.
 
* If partner accepts normally, rebid 3 of the major to invite. Partner will either pass or sign off by raising to the 4 level.
 
* If partner superaccepts, sign off by raising to the 4 level.
 
* If partner superaccepts, sign off by raising to the 4 level.
−
 
+
|-
−
I have 5-5 in the majors → Transfer to hearts by bidding 2♦.
+
| I have 5-5 in the majors
 +
| Transfer to hearts by bidding 2♦.
 
* If partner responds 2♥, rebid 2♠. Partner will either pass or sign off in 2NT, 3♥, 3♠, 3NT, 4♥, or 4♠, depending on their strength and distribution.
 
* If partner responds 2♥, rebid 2♠. Partner will either pass or sign off in 2NT, 3♥, 3♠, 3NT, 4♥, or 4♠, depending on their strength and distribution.
 
* If partner superaccepts by bidding 3♥, sign off by raising to the 4 level.
 
* If partner superaccepts by bidding 3♥, sign off by raising to the 4 level.
−
 
+
|-
−
I have 5-4 in the majors → Bid 2♣ to ask partner for a 4-card major. This is called the '''Stayman convention''', though the 5-4 case is not the usual one.
+
| I have 5-4 in the majors
 +
| Bid 2♣ to ask partner for a 4-card major. This is called the '''Stayman convention''', though the 5-4 case is not the usual one.
 
* If partner responds 2 of a major, raise to the 3 level to invite. Partner will pass or sign off by raising to the 4 level.
 
* If partner responds 2 of a major, raise to the 3 level to invite. Partner will pass or sign off by raising to the 4 level.
 
* If partner responds 2♦, denying a 4-card major, rebid 2 of your 5-card major. Partner will sign off in 2NT, 3M, 3NT, or 4M, again depending on strength and distribution.
 
* If partner responds 2♦, denying a 4-card major, rebid 2 of your 5-card major. Partner will sign off in 2NT, 3M, 3NT, or 4M, again depending on strength and distribution.
−
 
+
|-
−
I have a 5-card major → Transfer to the major.
+
| I have a 5-card major
 +
| Transfer to the major.
 
* If partner accepts normally, rebid 2NT to invite. Partner may pass or sign off in 3M, 3NT, or 4M.
 
* If partner accepts normally, rebid 2NT to invite. Partner may pass or sign off in 3M, 3NT, or 4M.
 
* If partner superaccepts, raise to the 4 level. Partner will pass.
 
* If partner superaccepts, raise to the 4 level. Partner will pass.
−
 
+
|-
−
I have at least one 4-card major → Bid 2♣, Stayman.
+
| I have at least one 4-card major
 +
| Bid 2♣, Stayman.
 
* If partner responds 2♦, denying a 4-card major, rebid 2NT to invite. Partner will pass or sign off in 3NT.
 
* If partner responds 2♦, denying a 4-card major, rebid 2NT to invite. Partner will pass or sign off in 3NT.
 
* If partner responds 2 of your major, raise to the 3 level to invite. Partner will pass or sign off by raising to the 4 level.
 
* If partner responds 2 of your major, raise to the 3 level to invite. Partner will pass or sign off by raising to the 4 level.
 
* If partner responds 2♥ and you have 4+ spades and 3- hearts, rebid 2♠. Partner will sign off in 2NT, 3♠, 3NT, or 4♠.
 
* If partner responds 2♥ and you have 4+ spades and 3- hearts, rebid 2♠. Partner will sign off in 2NT, 3♠, 3NT, or 4♠.
 
* If partner responds 2♠ and you have 4+ hearts and 3- spades, rebid 2NT. Partner will pass or sign off in 3NT.
 
* If partner responds 2♠ and you have 4+ hearts and 3- spades, rebid 2NT. Partner will pass or sign off in 3NT.
 +
|-
 +
| Otherwise
 +
| Bid 2NT. Partner will pass or sign off by raising to 3NT.
 +
|}
  
−
Otherwise → Bid 2NT. Partner will pass or sign off by raising to 3NT.
+
{|class="wikitable"
−
 
+
|+Responding with game-forcing strength (10+ HCP)
−
===With game-forcing strength===
+
! If... !! then...
−
I have a 6+-card major → Transfer to the major by bidding 4 of the suit below the major. This is called a '''Texas transfer'''. Partner will accept the transfer by signing off in 4 of your major.
+
|-
−
 
+
| I have a 6+-card major
−
I have 5-5 in the majors → Transfer to spades by bidding 2♥.
+
| Transfer to the major by bidding 4 of the suit below the major. This is called a '''Texas transfer'''. Partner will accept the transfer by signing off in 4 of your major.
 +
|-
 +
| I have 5-5 in the majors
 +
| Transfer to spades by bidding 2♥.
 
* If partner accepts normally, rebid 3♥. Partner will sign off in 3NT, 4♥, or 4♠.
 
* If partner accepts normally, rebid 3♥. Partner will sign off in 3NT, 4♥, or 4♠.
 
* If partner superaccepts, sign off by raising to the 4 level.
 
* If partner superaccepts, sign off by raising to the 4 level.
−
 
+
|-
−
I have 5-4 in the majors → Bid 2♣, Stayman.
+
| I have 5-4 in the majors
 +
| Bid 2♣, Stayman.
 
* If partner responds 2 of a major, sign off by jumping to the 4 level.
 
* If partner responds 2 of a major, sign off by jumping to the 4 level.
 
* If partner responds 2♦, rebid your '''4-card major''' at the 3 level. This is called a '''Smolen transfer'''. Partner will sign off in 3NT or 4 of your 5-card major (to show 3-card support). Like the Jacoby transfer, the Smolen transfer ensures that the 1NT opener ends up as declarer.
 
* If partner responds 2♦, rebid your '''4-card major''' at the 3 level. This is called a '''Smolen transfer'''. Partner will sign off in 3NT or 4 of your 5-card major (to show 3-card support). Like the Jacoby transfer, the Smolen transfer ensures that the 1NT opener ends up as declarer.
−
 
+
|-
−
I have a 5-card major → Transfer to the major.
+
| I have a 5-card major
 +
| Transfer to the major.
 
* If partner accepts normally, rebid 3NT. Partner will pass or sign off at the 4 level.
 
* If partner accepts normally, rebid 3NT. Partner will pass or sign off at the 4 level.
 
* If partner superaccepts, sign off by raising to the 4 level.
 
* If partner superaccepts, sign off by raising to the 4 level.
−
 
+
|-
−
I have at least one 4-card major → Bid 2♣, Stayman.
+
| I have at least one 4-card major
 +
| Bid 2♣, Stayman.
 
* If partner responds 2♦, denying a 4-card major, sign off by raising to 3NT.
 
* If partner responds 2♦, denying a 4-card major, sign off by raising to 3NT.
 
* If partner responds 2 of your major, sign off by jumping to the 4 level.
 
* If partner responds 2 of your major, sign off by jumping to the 4 level.
−
* If partner responds 2♥ and you have 4+ spades and 3- hearts, rebid 3NT. Partner will pass or sign off in 4♥.
+
* If partner responds 2♥ and you have 4+ spades and 3- hearts, rebid 3NT. Partner will pass or sign off in 4♠.
 
* If partner responds 2♠ and you have 4+ hearts and 3- spades, rebid 3NT. Partner will pass.
 
* If partner responds 2♠ and you have 4+ hearts and 3- spades, rebid 3NT. Partner will pass.
 +
|-
 +
| Otherwise
 +
| Sign off in 3NT.
 +
|}
  
−
===With slam-invitational or greater strength===
+
{|class="wikitable"
−
I have no 4-card or longer major, or I don't care about finding a trump fit → Make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]].
+
|+Responding with slam-invitational strength
−
 
+
! If... !! then...
−
I have a 6+-card major → Make a Texas transfer to your suit, then initiate [[User:Brian/Bridge/Control bidding|control bidding]] or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]].
+
|-
−
 
+
| I have no 4-card or longer major, or I have enough HCP to not care about finding a trump fit
−
I have 5-5 in the majors → Transfer to spades by bidding 2♥.
+
| Make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]].
 +
|-
 +
| I have a 6+-card major
 +
| Make a Texas transfer to your suit, then initiate [[User:Brian/Bridge/Control bidding|control bidding]] or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]] after partner accepts.
 +
|-
 +
| I have 5-5 in the majors
 +
| Transfer to spades by bidding 2♥.
 
* If partner accepts normally, rebid 3♥.
 
* If partner accepts normally, rebid 3♥.
 
:* If partner responds 3NT, make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]].
 
:* If partner responds 3NT, make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]].
 
:* If partner responds 4 of a major, initiate [[User:Brian/Bridge/Control bidding|control bidding]] or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]].
 
:* If partner responds 4 of a major, initiate [[User:Brian/Bridge/Control bidding|control bidding]] or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]].
−
* If partner superaccepts, initiate [[User:Brian/Bridge/Control bidding|control bidding]] or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]].
+
* If partner superaccepts, upgrade your hand if applicable, then initiate [[User:Brian/Bridge/Control bidding|control bidding]] or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]].
−
 
+
|-
−
I have 5-4 in the majors → Bid 2♣, Stayman.
+
| I have 5-4 in the majors
−
* If partner responds 2 of a major, initiate [[User:Brian/Bridge/Control bidding|control bidding]] or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]].
+
| Bid 2♣, Stayman.
 +
* If partner responds 2 of a major, respond with 3 of the other major, which shows agreement with partner's 4-card major and is a conventional slam try. This is called the '''Baze convention'''.
 +
:* If partner responds with 4 of your major, they have a minimal hand. You can pass or insist by initiating [[User:Brian/Bridge/Control bidding|control bidding]] or bidding 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]] anyway.
 +
:* If partner makes any other response, it is to be interpreted as a [[User:Brian/Bridge/Control bidding|control bid]] or 4NT, [[User:Brian/Bridge/Responding to Blackwood|Blackwood]].
 
* If partner responds 2♦, make a Smolen transfer.
 
* If partner responds 2♦, make a Smolen transfer.
 
:* If partner responds 3NT, make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]].
 
:* If partner responds 3NT, make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]].
 
:* If partner responds 4 of your 5-card major, initiate [[User:Brian/Bridge/Control bidding|control bidding]] or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]].
 
:* If partner responds 4 of your 5-card major, initiate [[User:Brian/Bridge/Control bidding|control bidding]] or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]].
−
 
+
|-
−
I have a 5-card major → Transfer to the major.
+
| I have a 5-card major
 +
| Transfer to the major.
 
* If partner accepts normally, make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]]. Partner may sign off in either notrump or your suit.
 
* If partner accepts normally, make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]]. Partner may sign off in either notrump or your suit.
−
* If partner superaccepts, initiate [[User:Brian/Bridge/Control bidding|control bidding]] or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]].
+
* If partner superaccepts, upgrade your hand if applicable, then initiate [[User:Brian/Bridge/Control bidding|control bidding]] or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]].
−
 
+
|-
−
Otherwise (I have at least one 4-card major) → Bid 2♣, Stayman.
+
| Otherwise (I have at least one 4-card major)
 +
| Bid 2♣, Stayman.
 
* If partner responds 2♦, denying a 4-card major, make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]].
 
* If partner responds 2♦, denying a 4-card major, make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]].
−
* If partner responds 2 of your major, respond with 3 of the other major, which is a conventional slam try. This is called the '''Baze convention'''.  
+
* If partner responds 2 of your major, respond with 3 of the other major.
 
:* If partner responds with 4 of your major, they have a minimal hand. You can pass or insist by initiating [[User:Brian/Bridge/Control bidding|control bidding]] or bidding 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]] anyway.
 
:* If partner responds with 4 of your major, they have a minimal hand. You can pass or insist by initiating [[User:Brian/Bridge/Control bidding|control bidding]] or bidding 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]] anyway.
 
:* If partner makes any other response, it is to be interpreted as a [[User:Brian/Bridge/Control bidding|control bid]] or 4NT, [[User:Brian/Bridge/Responding to Blackwood|Blackwood]].
 
:* If partner makes any other response, it is to be interpreted as a [[User:Brian/Bridge/Control bidding|control bid]] or 4NT, [[User:Brian/Bridge/Responding to Blackwood|Blackwood]].
 
* If partner responds 2 of the other major, make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]]. Partner may sign off in either notrump or your suit.
 
* If partner responds 2 of the other major, make a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]]. Partner may sign off in either notrump or your suit.
 +
|}
  
 
==Notes on the Jacoby transfer==
 
==Notes on the Jacoby transfer==

Latest revision as of 22:53, 25 June 2017

When your partner opens 1NT, you must announce the range of HCP that their bid shows. "15 to 17" is the most common range, but the responses and subsequent bidding below can be applied with any 1NT range.

Without interference[edit]

Responding with minimal strength (8− HCP)
If... then...
I have one 5+-card major Transfer to the major.
  • If partner accepts by bidding 2 of the major (the most common case), pass.
  • If partner superaccepts by bidding 3 of the major, re-evaluate your hand given the fit. You can either pass or, if your combined hands are now game-going, raise to the 4 level.
I have 5+ cards in both majors Transfer to the better of your two majors using the above procedure, then pass.
Otherwise Pass.
Responding with invitational strength (9 HCP)
If... then...
I have a 6+-card major Transfer to the major.
  • If partner accepts normally, rebid 3 of the major to invite. Partner will either pass or sign off by raising to the 4 level.
  • If partner superaccepts, sign off by raising to the 4 level.
I have 5-5 in the majors Transfer to hearts by bidding 2♦.
  • If partner responds 2♥, rebid 2♠. Partner will either pass or sign off in 2NT, 3♥, 3♠, 3NT, 4♥, or 4♠, depending on their strength and distribution.
  • If partner superaccepts by bidding 3♥, sign off by raising to the 4 level.
I have 5-4 in the majors Bid 2♣ to ask partner for a 4-card major. This is called the Stayman convention, though the 5-4 case is not the usual one.
  • If partner responds 2 of a major, raise to the 3 level to invite. Partner will pass or sign off by raising to the 4 level.
  • If partner responds 2♦, denying a 4-card major, rebid 2 of your 5-card major. Partner will sign off in 2NT, 3M, 3NT, or 4M, again depending on strength and distribution.
I have a 5-card major Transfer to the major.
  • If partner accepts normally, rebid 2NT to invite. Partner may pass or sign off in 3M, 3NT, or 4M.
  • If partner superaccepts, raise to the 4 level. Partner will pass.
I have at least one 4-card major Bid 2♣, Stayman.
  • If partner responds 2♦, denying a 4-card major, rebid 2NT to invite. Partner will pass or sign off in 3NT.
  • If partner responds 2 of your major, raise to the 3 level to invite. Partner will pass or sign off by raising to the 4 level.
  • If partner responds 2♥ and you have 4+ spades and 3- hearts, rebid 2♠. Partner will sign off in 2NT, 3♠, 3NT, or 4♠.
  • If partner responds 2♠ and you have 4+ hearts and 3- spades, rebid 2NT. Partner will pass or sign off in 3NT.
Otherwise Bid 2NT. Partner will pass or sign off by raising to 3NT.
Responding with game-forcing strength (10+ HCP)
If... then...
I have a 6+-card major Transfer to the major by bidding 4 of the suit below the major. This is called a Texas transfer. Partner will accept the transfer by signing off in 4 of your major.
I have 5-5 in the majors Transfer to spades by bidding 2♥.
  • If partner accepts normally, rebid 3♥. Partner will sign off in 3NT, 4♥, or 4♠.
  • If partner superaccepts, sign off by raising to the 4 level.
I have 5-4 in the majors Bid 2♣, Stayman.
  • If partner responds 2 of a major, sign off by jumping to the 4 level.
  • If partner responds 2♦, rebid your 4-card major at the 3 level. This is called a Smolen transfer. Partner will sign off in 3NT or 4 of your 5-card major (to show 3-card support). Like the Jacoby transfer, the Smolen transfer ensures that the 1NT opener ends up as declarer.
I have a 5-card major Transfer to the major.
  • If partner accepts normally, rebid 3NT. Partner will pass or sign off at the 4 level.
  • If partner superaccepts, sign off by raising to the 4 level.
I have at least one 4-card major Bid 2♣, Stayman.
  • If partner responds 2♦, denying a 4-card major, sign off by raising to 3NT.
  • If partner responds 2 of your major, sign off by jumping to the 4 level.
  • If partner responds 2♥ and you have 4+ spades and 3- hearts, rebid 3NT. Partner will pass or sign off in 4♠.
  • If partner responds 2♠ and you have 4+ hearts and 3- spades, rebid 3NT. Partner will pass.
Otherwise Sign off in 3NT.
Responding with slam-invitational strength
If... then...
I have no 4-card or longer major, or I have enough HCP to not care about finding a trump fit Make a quantitative raise.
I have a 6+-card major Make a Texas transfer to your suit, then initiate control bidding or bid 4NT, Blackwood after partner accepts.
I have 5-5 in the majors Transfer to spades by bidding 2♥.
  • If partner accepts normally, rebid 3♥.
I have 5-4 in the majors Bid 2♣, Stayman.
  • If partner responds 2 of a major, respond with 3 of the other major, which shows agreement with partner's 4-card major and is a conventional slam try. This is called the Baze convention.
  • If partner responds with 4 of your major, they have a minimal hand. You can pass or insist by initiating control bidding or bidding 4NT, Blackwood anyway.
  • If partner makes any other response, it is to be interpreted as a control bid or 4NT, Blackwood.
  • If partner responds 2♦, make a Smolen transfer.
I have a 5-card major Transfer to the major.
  • If partner accepts normally, make a quantitative raise. Partner may sign off in either notrump or your suit.
  • If partner superaccepts, upgrade your hand if applicable, then initiate control bidding or bid 4NT, Blackwood.
Otherwise (I have at least one 4-card major) Bid 2♣, Stayman.
  • If partner responds 2♦, denying a 4-card major, make a quantitative raise.
  • If partner responds 2 of your major, respond with 3 of the other major.
  • If partner responds with 4 of your major, they have a minimal hand. You can pass or insist by initiating control bidding or bidding 4NT, Blackwood anyway.
  • If partner makes any other response, it is to be interpreted as a control bid or 4NT, Blackwood.
  • If partner responds 2 of the other major, make a quantitative raise. Partner may sign off in either notrump or your suit.

Notes on the Jacoby transfer[edit]

The Jacoby transfer shows a 5+-card major suit by bidding the suit below that suit. For example, if partner has opened 1NT, respond 2♦ to show 5 hearts, or 2♥ to show 5 spades. Your partner will then accept the transfer by bidding your suit (2♥ or 2♠, respectively). The point is to make partner mention the suit first so they end up as declarer, since they probably have the stronger hand.

Partner is obligated to accept the transfer, provided that the opponents don't interfere. This is the case even if partner only has two-card support. So for example, 2♦ forces a 2♥ response. The exception: if opener has a maximum and four-card support for your major, they will superaccept by bidding the major at the 3 level. So a 3♥ response to 2♦ is a superaccept, as is 3♠ to 2♥.

A normal acceptance (not a superacceptance) of a Jacoby transfer does not imply suit agreement, since the response was forced. Opener might have only two-card support for your suit. For this reason, rebidding your suit after a normal response to a Jacoby transfer necessarily shows at least a 6-card suit (so that an 8-card trump fit is guaranteed). With only a 5-card suit, you are not allowed to rebid your suit. This is why the 2NT and 3NT rebids are frequently used. These show that you hold exactly 5 of your major.

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