Editing User:Brian/Bridge/Rebids after a 1NT opening

See [[User:Brian/Bridge/Responding_to_a_1NT_opening|Responding to a 1NT opening]] for an explanation of the Stayman convention and Jacoby transfers.

==Without interference==
{|class="wikitable"
|+ Meanings of partner's responses
! The following response to 1NT... !! means...
|-
| 2&clubs; 
| The Stayman convention, showing invitational or greater strength and asking for a 4 card major. To respond, see the table below.
|-
| 2&diams;
| A Jacoby transfer, showing 5+ hearts and asking you to bid hearts so you become declarer. Announce "transfer", then respond according to the table below.
|-
| 2&hearts;
| A Jacoby transfer, showing 5+ spades and asking you to bid spades so you become declarer. Announce "transfer", then respond according to the table below.
|-
| 2NT or a higher notrump
| A [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]]; respond accordingly or pass.
|-
| 4&clubs;
| [[User:Brian/Bridge/Responding to Gerber|Gerber]], asking for aces.
|-
| 4&diams;
| 6+ hearts and game-forcing strength, asking you to bid hearts so you become declarer. Announce "transfer", then bid 4&hearts;.
* Most of the time, partner will pass.
* If partner bids again, it is a slam try: either a [[User:Brian/Bridge/Control bidding|control bid]] or [[User:Brian/Bridge/Responding to Blackwood|Blackwood]].
|-
| 4&hearts;
| Like 4&diams;, but a transfer to spades instead.
|}

{|class="wikitable"
|+ Responses to Stayman
! If... !! then...
|-
| I have 4+ hearts
| Bid 2&hearts;.
* If partner responds 2&spades;, it means they have 4 spades, 3- hearts, and invitational strength. Sign off in 2NT, 3&spades;, 3NT, or 4&spades;, depending on your strength and whether you have 4-card spade support.
* If partner responds 2NT, it means they have no 4-card major (the Stayman was "fake") but invitational strength. Pass or sign off in 3NT.
* If partner responds 3&hearts;, it means they have 4+ hearts and invitational strength. Pass or sign off by raising to 4&hearts;.
* If partner responds 3&spades;, it is a slam try showing agreement in hearts. Alert partner's bid. With a minimum, respond 4&hearts;. If partner bids again, it is a [[User:Brian/Bridge/Control bidding|control bid]] or [[User:Brian/Bridge/Responding to Blackwood|Blackwood]]. With a better hand, initiate control bidding or bid 4NT, [[User:Brian/Bridge/Blackwood|Blackwood]].
* If partner responds 3NT, it means they have game-forcing strength, 4 spades, and 3- hearts. Pass or sign off in 4&spades.
* If partner responds 4&hearts;, it is a sign-off.
* If partner responds 4NT, 5NT, 6NT, or 7NT, it is [[User:Brian/Bridge/Quantitative notrump raises|quantitative]] and shows 4 spades. Pass or make a sign-off either in notrump or spades.
|-
| I have 4+ spades
| Bid 2&spades;.
* If partner responds 2NT, they show invitational strength without 4-card spade support. Pass or sign off in 3NT.
* If partner responds 3NT, they show game-forcing strength without 4-card spade support. Pass.
* In all other cases, the subsequent bidding is the same as in the previous paragraph, but exchange "spades" and "hearts".
|-
| I have no 4-card major
| Bid 2&diams;.
* If partner responds 2M, they show invitational strength with 5 of the bid major and 4 of the unbid major. Sign off in 2NT, 3M, 3NT, or 4M, depending on your strength and whether you have 3-card support for partner's 5-card major.
* If partner responds 2NT, they have invitational strength. Pass or sign off in 3NT.
* If partner responds 3M, they show game-forcing strength with '''5 of the other major''' (oM) and 4 of the bid major. With 3-card support for oM, raise to 4oM; if partner bids again, it is a [[User:Brian/Bridge/Control bidding|control bid]] or [[User:Brian/Bridge/Responding to Blackwood|Blackwood]]. Otherwise, rebid 3NT; if partner bids again, it is a [[User:Brian/Bridge/Quantitative notrump raises|quantitative raise]].
* If partner responds 3NT, it is a sign-off. Pass.
* If partner responds 4NT, 5NT, 6NT, or 7NT, it is [[User:Brian/Bridge/Quantitative notrump raises|quantitative]].
|}

{|class="wikitable"
|+ Rebids after a Jacoby transfer
! If... !! then...
|-
| I have 17 HCP with 4+-card support for partner's major
| Superaccept by bidding 3 of the major.
* If partner responds 4 of the major, it is a sign-off.
* Any other response by partner is a slam try: either a [[User:Brian/Bridge/Control bidding|control bid]] or [[User:Brian/Bridge/Responding to Blackwood|Blackwood]].
|-
| Partner's bid was 2&diams;, showing hearts
| Accept by bidding 2&hearts;.
* If partner responds 2&spades;, they have invitational strength with 5-5 in the majors. Pass with a minimum, sign off in 2NT or 3NT to deny 3-card support for both majors, or support either major if possible by signing off in 3 or 4 of the major you want to support.
* If partner responds 3&hearts;, they have invitational strength with 6 hearts. Pass or sign off by raising to 4&hearts;.
* If partner responds with notrump, it is [[User:Brian/Bridge/Quantitative notrump raises|quantitative]] and shows exactly 5 hearts. With 3-card support, sign off in hearts at the appropriate level. Without 3-card support, pass or sign off in notrump at the appropriate level.
:* One common case is that the response is 2NT, showing invitational strength and exactly 5 hearts. Pass or sign off in 3&hearts;, 3NT, or 4&hearts;.
:* Another common case is 3NT, showing game-forcing strength and exactly 5 hearts. Pass or sign off in 4&hearts;.
|-
| Partner's bid was 2&hearts;, showing spades
| Accept by bidding 2&spades;.
* If partner responds 3&hearts;, they have game-forcing strength with 5-5 in the majors. With 3-card support for either major, raise to 4 of the major; any subsequent bid by partner is either a [[User:Brian/Bridge/Control bidding|control bid]] or [[User:Brian/Bridge/Responding to Blackwood|Blackwood]]. If you can't support either major, rebid 3NT; any subsequent bid by partner is [[User:Brian/Bridge/Quantitative notrump raises|quantitative]].
* For all other responses, see the previous paragraph, but exchange "spades" and "hearts".
|}