[paulsim]

Hi all,

1Y_____1Z
3Y_____3Z shows 5 or 6?

Is there any standard?

Always shows 6? 5? upon space?

1♣______1♠
3♣______3♠ shows always 6? just 5? upon agreement?

.- 3♦ is or can be, NMF?
.- 3♥ cannot be natural. Does shows stopper or denies?


less room needs more flexibility?

1♦______1♠
3♦______3♠ 6? 5?

3♥ is NMF or stopper, or maybe denies stopper?


1♥_____1♠
3♥_____3♠ shows 5+? promise 6?


Thanks all,
Merry Christmas

Kind Regards,
Paul_S

[DavidKok]

For me these rebids of a major suit show 6. However, there are five more things I'd like to say:

• The range of the jump rebid might matter quite a bit. For me it's 15-17. I know some people play that these jumps are stronger, while I've also seen 14-16. This has an impact on responder's priorities over the jump rebid. The general idea is that the rebid is sufficiently narrowly defined that responder will investigate the right game, and we have no more invitational sequences.
  
• I play that a jump response to the 2-level of a 1-level opening, such as 1♣-2♠, is weak (4-8) and shows 6+ cards. Eliminating these weak shapely hands from the other responses solves a bunch of problems if opener was about to jump, and I think the first round structure should cater to hands that might have issues on the second round especially on jump or non-NT rebids.
  
• There is a gap in standard called the 'Bridge World Death Hand'. It is a hand with 6(+) cards in a suit, approximately 16+ points and exactly 3-card support for responder's major. On any start (such as 1♣-1♠) this hand is stuck - rebid to show the clubs and you might miss a 5-3 spade fit, but no raise adequately covers 'strong with 3-card support'. There is no standard solution, and recognising that this is a system problem is very good. Personally I know of plenty of ways to resolve this problem, but not without making further changes to the bidding structure. If you choose not to cater to this hand type I strongly recommend accepting the occasional loss and being at peace with a system gap, rather than trying to find 5-3 fits on the second round.
  
• On 1♣-1♠; 3♣ in particular, what hand can responder have with 5 spades? With a 5-4 responder can introduce any second suit now. With 4 clubs in support we should likely play in the 10-card fit and raise clubs. It's just the 5♠(332) hands that are left - not the largest issue. However, on other similar auctions (notably, 1♦-1♥; 3♦ as well as 1♥-1♠; 3♥) the problem is bigger.
  
• Regarding the meaning of responder's other rebids, I think your questions regarding stoppers (showing? asking?) and artificial cheap asking bids (NMF?) are costing more than they gain. Best of luck, I'm so glad I no longer worry about stoppers like this.

[bluenikki]

paulsim, on 2025-December-24, 03:03, said:

Hi all,

1Y_____1Z
3Y_____3Z shows 5 or 6?

When Y is diamonds, responder needs a call to show club stopper but no stopper in the unbid major. What's left but 3Z? Artificial. unrelated to Z.

A corollary to this is that when a diamond opener has the death hand, they must fabricate a reverse. Or something else artificial.