User:Brian/Bridge/Subsequent bidding after an inverted minor raise - Revision history

Brian at 07:59, 20 June 2017

2017-06-20T07:59:43Z

Brian at 07:02, 16 June 2017

2017-06-16T07:02:46Z

Brian at 01:41, 13 June 2017

2017-06-13T01:41:18Z

Brian: Created page with "Inverted minor raises are alertable. A raise of the minor implies that no major suit fit can exist, so the partnership must play in either the minor suit or notrump. With stop..."

2017-06-12T18:55:22Z

Created page with "Inverted minor raises are alertable. A raise of the minor implies that no major suit fit can exist, so the partnership must play in either the minor suit or notrump. With stop..."

New page

Inverted minor raises are alertable. A raise of the minor implies that no major suit fit can exist, so the partnership must play in either the minor suit or notrump. With stoppers in all suits, a 3NT game is preferable to a 5m game, since making a 5m contract requires additional strength.

==Stopper-bidding sequences==
In order to determine whether a notrump game is advisable, partners bid stoppers up the line. Once stopper-bidding has commenced, rebids by either partner are as follows:
* With game-going strength and all remaining suits stopped, one signs off in 3NT.
* With all remaining suits stopped but not knowing whether one has enough strength for 3NT, one bids 2NT. Partner then signs off in 3NT with enough strength, or 3m otherwise.
* Otherwise, one either bids a stopper they have in a remaining suit (allowing partner to continue bidding stoppers up the line) or signs off in the agreed minor, whichever is cheaper.

==Opener's rebids==
My partner single-raised my minor, I have a minimum (13- HCP), and partner is a passed hand → Pass.

My partner single-raised my minor, I have a minimum (13- HCP), and partner is an unpassed hand → Respond 3m. Subsequent bids by partner show are stopper-showing (see below) and indicate game-forcing strength (14+ HCP).

My partner single-raised my minor, I have 14–15 HCP, and stoppers in the other three suits → Rebid 2NT, invitational to 3NT.

My partner single-raised my minor, I have 16+ HCP and stoppers in the other three suits → Rebid 3NT, to play.

My partner single-raised my minor, I have 15- HCP and stoppers in the other three suits →

...

@@ Line 2: / Line 2: @@
 The reason why many partnerships play minor raises inverted is that minor suit contracts are not actually the most desirable. Even with a minor suit fit, notrump is often preferable. By making the strong raise only a single raise, bidding space is conserved so the partnership can figure out whether or not to play in notrump. Specifically, a raise of the minor implies that no major suit fit can exist, so the minor suit and notrump are the only two options. With stoppers in all suits, a 3NT game is preferable to a 5m game, since making a 5m contract requires additional strength. Therefore, following an inverted minor raise, one partner or the other usually initiates stopper-bidding to determine whether notrump is viable.
 ==Meanings of subsequent bids==
 If you are opener, you must alert your partner's raise.
 {| class="wikitable"
-|+Opener's rebids
+|+Opener's rebids after a single raise
 |-
 ! If... !! then...
 |-
-| My partner single-raised my minor, I have a minimum (13- HCP), and partner is a passed hand
+| I have a minimum (12- HCP), and partner is a passed hand
 | Pass. Some partnerships have an agreement that the single raise is one-round forcing, but in this particular circumstance it really makes no sense to continue bidding&mdash;with a minimum hand opposite an invitational hand, 3NT is out of the picture, and rebidding 3m has no potential upside, not even preemptive value given that both opponents have passed.
 |-
-| My partner single-raised my minor, I have a minimum (13- HCP), and partner is an unpassed hand
+| I have a minimum (12- HCP), and partner is an unpassed hand
 | Rebid 3 of your minor. (Since 2NT has now been bypassed, any subsequent stopper-showing bid by partner indicates enough strength for 3NT.)
 |-
-| My partner single-raised my minor and I have extra strength (15&ndash;18 total points) with a void or small singleton in a side suit and stoppers in the other two side suits
+| I have 13&ndash;14 HCP with stoppers in all side suits
 | Make a [[User:Brian/Bridge/Splinter|splinter bid]]. Exception: avoid splintering in clubs since bidding 4&clubs; makes it impossible to sign off in 3NT.
 |-
-| My partner single-raised my minor and I have a maximum (19+ total points)
+| I have a maximum (19+ total points)
 | TODO: how to do minor-suit slam bidding?
 |-
-| My partner single-raised my minor, and none of the above apply
+| I have a side suit stopper but I don't have all three side suits stopped.
-| Initiate stopper-bidding.
+| Initiate stopper-bidding as described below.
 |-
-| My partner double-raised my minor and I have a maximum, so I think 3NT is viable with stoppers in all unbid suits
+| Otherwise (I don't have any side suit stoppers)
-| Initiate stopper-bidding. (You may be wondering: what if I don't have ''any'' stoppers to show and partner has ''all'' of them? How will we find 3NT then? But I think this situation is impossible. If partner had stoppers in all three side suits, shouldn't they have been strong enough for a single raise?)
+| (TODO: Can responder make an inverted minor raise if they have all three side suit stoppers?)
-|-
-| Otherwise
-| Pass
 |}
@@ Line 46: / Line 46: @@
 | Pass.
 |-
-| Partner rebid 2NT after my raise and I have 13+ HCP
+| Partner rebid 2NT after my raise and I have 12+ HCP
-| Raise to 3NT.
+| Raise to 3NT, since partner's 2NT rebid shows 13&ndash;14 HCP.
 |-
-| Partner rebid 2NT after my raise and I have 12- HCP
+| Partner rebid 2NT after my raise and I have 11- HCP
-| Correct to 3m.
+| Sign off in 3m.
 |-
 | Partner bid a new suit after my double raise
-| Participate in stopper-bidding (see above).
+| See below on how to participate in stopper-bidding.
 |-
 | Partner jump-shifted after my single raise
@@ Line 59: / Line 59: @@
 |-
 | Partner bid a new suit after my single raise
-| Participate in stopper-bidding (see above).
+| See below on how to participate in stopper-bidding.
 |-
 | Partner rebid 3m and I have 14+ HCP with all the side suits stopped
 | Sign off in 3NT.
 |-
-| Partner rebid 3m and I have 14+ HCP
+| Partner rebid 3m and I have 14+ HCP with at least one side suit stopped
-| Initiate stopper-bidding (see above).
+| Initiate stopper-bidding (see below).
 |-
-| Partner rebid 3m and I have 13- HCP
+| Partner rebid 3m and none of the above are true
-| Pass.
+| Pass. (TODO: What if responder has slam interest?)
 |}

@@ Line 1: / Line 1: @@
-Inverted minor raises are alertable. A raise of the minor implies that no major suit fit can exist, so the partnership must play in either the minor suit or notrump. With stoppers in all suits, a 3NT game is preferable to a 5m game, since making a 5m contract requires additional strength. Therefore, following an inverted minor raise, one partner or the other usually initiates stopper-bidding to determine whether notrump is viable.
+Inverted minors is a system in which a single raise of opener's minor is strong while a jump raise is weak. That is, 1&diams; - 3&diams; shows a weaker hand (on responder's part) than 1&diams; - 2&diams;. This is the opposite of major suit raises, where a jump raise is stronger than a single raise.
 ==Stopper-bidding sequences==
@@ Line 7: / Line 9: @@
 * Otherwise, one either bids a stopper they have in a remaining suit (allowing partner to continue bidding stoppers up the line) or signs off in the agreed minor, whichever is cheaper.
-==Opener's rebids==
+==Meanings of subsequent bids==
-My partner single-raised my minor, I have a minimum (13- HCP), and partner is a passed hand &rarr; Pass.
+If you are opener, you must alert your partner's raise.
-* Some partnerships have an agreement that the single raise is one-round forcing, but in this particular circumstance it really makes no sense to continue bidding&mdash;with a minimum hand opposite an invitational hand, 3NT is out of the picture, and rebidding 3m has no potential upside, not even preemptive value given that both opponents have passed.
+{| class="wikitable"
+|+Opener's rebids
-My partner single-raised my minor, I have a minimum (13- HCP), and partner is an unpassed hand &rarr; Respond 3m. Subsequent bids by partner show are stopper-showing and indicate game-forcing strength (14+ HCP).
+|-
+! If... !! then...
-My partner single-raised my minor and I have extra strength (15&ndash;18 total points) with a void or small singleton in a side suit and stoppers in the other two side suits &rarr; Make a [[User:Brian/Bridge/Splinter|splinter bid]]. Exception: avoid splintering in clubs since bidding 4&clubs; makes it impossible to sign off in 3NT.
+|-
+| My partner single-raised my minor, I have a minimum (13- HCP), and partner is a passed hand
-My partner single-raised my minor and I have a maximum (19+ total points) &rarr; TODO: how to do minor-suit slam bidding?
+| Pass. Some partnerships have an agreement that the single raise is one-round forcing, but in this particular circumstance it really makes no sense to continue bidding&mdash;with a minimum hand opposite an invitational hand, 3NT is out of the picture, and rebidding 3m has no potential upside, not even preemptive value given that both opponents have passed.
+|-
-My partner single-raised my minor, and none of the above apply &rarr; Initiate stopper-bidding.
+| My partner single-raised my minor, I have a minimum (13- HCP), and partner is an unpassed hand
+| Rebid 3 of your minor. (Since 2NT has now been bypassed, any subsequent stopper-showing bid by partner indicates enough strength for 3NT.)
-My partner double-raised my minor and I have a maximum, so I think 3NT is viable with stoppers in all unbid suits &rarr; Initiate stopper-bidding. (Note that this depends on partnership agreement about the minimum amount of strength a jump raise can be made with.)
+|-
-My partner double-raised my minor and I don't think 3NT is viable &rarr; Pass.
+{| class="wikitable"

@@ Line 1: / Line 1: @@
-Inverted minor raises are alertable. A raise of the minor implies that no major suit fit can exist, so the partnership must play in either the minor suit or notrump. With stoppers in all suits, a 3NT game is preferable to a 5m game, since making a 5m contract requires additional strength.
+Inverted minor raises are alertable. A raise of the minor implies that no major suit fit can exist, so the partnership must play in either the minor suit or notrump. With stoppers in all suits, a 3NT game is preferable to a 5m game, since making a 5m contract requires additional strength. Therefore, following an inverted minor raise, one partner or the other usually initiates stopper-bidding to determine whether notrump is viable.
 ==Stopper-bidding sequences==
@@ Line 9: / Line 9: @@
 ==Opener's rebids==
 My partner single-raised my minor, I have a minimum (13- HCP), and partner is a passed hand &rarr; Pass.
-My partner single-raised my minor, I have a minimum (13- HCP), and partner is an unpassed hand &rarr; Respond 3m. Subsequent bids by partner show are stopper-showing (see below) and indicate game-forcing strength (14+ HCP).
+My partner single-raised my minor, I have a minimum (13- HCP), and partner is an unpassed hand &rarr; Respond 3m. Subsequent bids by partner show are stopper-showing and indicate game-forcing strength (14+ HCP).
-My partner single-raised my minor, I have 14&ndash;15 HCP, and stoppers in the other three suits &rarr; Rebid 2NT, invitational to 3NT.
+My partner single-raised my minor and I have extra strength (15&ndash;18 total points) with a void or small singleton in a side suit and stoppers in the other two side suits &rarr; Make a [[User:Brian/Bridge/Splinter|splinter bid]]. Exception: avoid splintering in clubs since bidding 4&clubs; makes it impossible to sign off in 3NT.
-My partner single-raised my minor, I have 16+ HCP and stoppers in the other three suits &rarr; Rebid 3NT, to play.
+My partner single-raised my minor and I have a maximum (19+ total points) &rarr; TODO: how to do minor-suit slam bidding?
-My partner single-raised my minor, I have 15- HCP and stoppers in the other three suits &rarr;
+My partner single-raised my minor, and none of the above apply &rarr; Initiate stopper-bidding.
-...
+My partner double-raised my minor and I have a maximum, so I think 3NT is viable with stoppers in all unbid suits &rarr; Initiate stopper-bidding. (Note that this depends on partnership agreement about the minimum amount of strength a jump raise can be made with.)