Editing User:Brian/Bridge/Subsequent bidding after an inverted minor raise
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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. | 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. | ||
+ | |||
+ | ==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. | ||
==Meanings of subsequent bids== | ==Meanings of subsequent bids== | ||
If you are opener, you must alert your partner's raise. | If you are opener, you must alert your partner's raise. | ||
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{| class="wikitable" | {| class="wikitable" | ||
− | |+Opener's rebids | + | |+Opener's rebids |
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! If... !! then... | ! If... !! then... | ||
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− | | I have a minimum ( | + | | My partner single-raised my minor, I have a minimum (13- 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—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. | | 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—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. | ||
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− | | I have a minimum ( | + | | 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.) | | Rebid 3 of your minor. (Since 2NT has now been bypassed, any subsequent stopper-showing bid by partner indicates enough strength for 3NT.) | ||
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− | | | + | | My partner single-raised my minor and I have extra strength (15–18 total points) with a void or small singleton in a side suit and stoppers in the other two side suits |
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| Make a [[User:Brian/Bridge/Splinter|splinter bid]]. Exception: avoid splintering in clubs since bidding 4♣ makes it impossible to sign off in 3NT. | | Make a [[User:Brian/Bridge/Splinter|splinter bid]]. Exception: avoid splintering in clubs since bidding 4♣ makes it impossible to sign off in 3NT. | ||
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− | | I have a maximum (19+ total points) | + | | My partner single-raised my minor and I have a maximum (19+ total points) |
| TODO: how to do minor-suit slam bidding? | | TODO: how to do minor-suit slam bidding? | ||
|- | |- | ||
− | | | + | | My partner single-raised my minor, and none of the above apply |
− | | Initiate stopper-bidding | + | | 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 |
− | | ( | + | | 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?) |
+ | |- | ||
+ | | Otherwise | ||
+ | | Pass | ||
|} | |} | ||
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| Pass. | | Pass. | ||
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− | | Partner rebid 2NT after my raise and I have | + | | Partner rebid 2NT after my raise and I have 13+ HCP |
− | | Raise to 3NT | + | | Raise to 3NT. |
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− | | Partner rebid 2NT after my raise and I have | + | | Partner rebid 2NT after my raise and I have 12- HCP |
− | | | + | | Correct to 3m. |
|- | |- | ||
| Partner bid a new suit after my double raise | | Partner bid a new suit after my double raise | ||
− | | | + | | Participate in stopper-bidding (see above). |
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| Partner jump-shifted after my single raise | | Partner jump-shifted after my single raise | ||
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| Partner bid a new suit after my single raise | | Partner bid a new suit after my single raise | ||
− | | | + | | Participate in stopper-bidding (see above). |
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| Partner rebid 3m and I have 14+ HCP with all the side suits stopped | | Partner rebid 3m and I have 14+ HCP with all the side suits stopped | ||
| Sign off in 3NT. | | Sign off in 3NT. | ||
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− | | Partner rebid 3m and I have 14+ HCP | + | | Partner rebid 3m and I have 14+ HCP |
− | | Initiate stopper-bidding (see | + | | Initiate stopper-bidding (see above). |
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− | | Partner rebid 3m and | + | | Partner rebid 3m and I have 13- HCP |
− | + | | Pass. | |
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|} | |} |