[thorvald]

This could need some improvement

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For hose who created the convention and for the ones who implemented it, it might make sense to use 3Mi to show values instead of length, but after 3♠ it makes no sense to start cuebidding on a minimum hand. 3N should be the bid

[mycroft]

Soloway Jump Shifts are done on three types of hands:

• Strong one-suiter that will play in that suit (or NT) - this hand will rebid the suit
  
• Strong two-suiter *including opener's* - this hand will rebid opener's suit
  
• Hand too strong to bid NT - this hand will rebid NT.

All of which should be 19 or so - interested in slam opposite the right minimum opener.

What you won't have, guaranteed, is a two-suiter not including opener's suit. This is why opener's rebid is basically a pre-cue (shows values and not length) - it doesn't know where you intend to play, but it knows you do.

After 3♠, its job is to get you to the right level of spades - 3NT is Not An Option. You've told it that 3NT isn't in play. Unless 3NT shows a hand completely unsuitable for slam - i.e. balanced aceless 12, I guess.

Unfortunate you got to a 50% slam where the club K was offside.

Whether Soloway J/S are the best use for jump shifts is a question. Whether the standard followups are best is also a question. But opener did their job.

[thorvald]

mycroft, on 2022-October-25, 09:43, said:

Soloway Jump Shifts are done on three types of hands:

• Strong one-suiter that will play in that suit (or NT) - this hand will rebid the suit
• Strong two-suiter *including opener's* - this hand will rebid opener's suit
• Hand too strong to bid NT - this hand will rebid NT.

All of which should be 19 or so - interested in slam opposite the right minimum opener.

What you won't have, guaranteed, is a two-suiter not including opener's suit. This is why opener's rebid is basically a pre-cue (shows values and not length) - it doesn't know where you intend to play, but it knows you do.

After 3♠, its job is to get you to the right level of spades - 3NT is Not An Option. You've told it that 3NT isn't in play. Unless 3NT shows a hand completely unsuitable for slam - i.e. balanced aceless 12, I guess.

Unfortunate you got to a 50% slam where the club K was offside.

Whether Soloway J/S are the best use for jump shifts is a question. Whether the standard followups are best is also a question. But opener did their job.

As the slam also needs the ♠ to be 3-3 it is a terrible slam.

But remember as responder to a Soloway Jump Shift you have opened, and for 11 HCP with only one key card is minimum

[mycroft]

You said you can play opposite a small singleton. If there's a trump loser, it's because your suit isn't good enough.

Okay, according to what I see, (for instance) you might have AKJxxxx. But then you would have asked for the trump queen.

Opener did what they were asked to do.

[johnu]

thorvald, on 2022-October-24, 09:03, said:

For hose who created the convention and for the ones who implemented it, it might make sense to use 3Mi to show values instead of length

According to the description of 3♣, that's what GIB is doing, showing KQ (or ace or better?) of clubs. There's no mention of club length.

[johnu]

mycroft, on 2022-October-25, 09:43, said:

What you won't have, guaranteed, is a two-suiter not including opener's suit.

According to GIB 2/1 notes, responder can have a 4 card side suit with a solid primary suit.

mycroft, on 2022-October-25, 09:43, said:

After 3♠, its job is to get you to the right level of spades - 3NT is Not An Option. You've told it that 3NT isn't in play.

3NT should almost always be an option, and you haven't said that 3NT isn't in play. 3♠ only shows you have a strong rebiddable or solid suit. Opener should be able to rebid 3NT with short spades and stoppers in the other suits.

From the system notes:

Quote

GIB plays Soloway Strong Jump Shifts by an unpassed hand in uncontested auctions. A jump shift shows one of the following types of hands:

Strong rebiddable suit, 17+ total points, 4+ controls (A=2, K=1), no side 4-card suit
Solid suit, 17+ total points, 4+ controls, may have a side 4-card suit
Rebiddable suit, 18+ HCP, 4+ controls, 5332 or 6322 shape.
Rebiddable suit, 17+ total points, 4+ controls, 4-card support for opener's suit

...

Jump shifter shows which type of hand it had with its next bid:

With types 1 or 2, it rebids its suit, jumping to game with a minimum and solid suit (note that it never shows the side suit in type 2).
With type 3, it bids NT or raises NT to game.
With type 4, it raises opener's suit with no side shortness, or bids its short suit (this is why it can never show its own side suit – a new suit is a splinter in support of opener).

That being said,the systemic rebid is to rebid 3NT and not 3♠ over 3♣ with stoppers in the other suits (type 3 hand). Not sure what GIB would do if one of the suits was not stopped.