[cencio]

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explain me where is the mistake, My bid of 3 nt ?

[jillybean]

I don't know GIB but 2H can't be right

[johnu]

From the GIB System Notes:

Quote

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

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

Strong jump shifts are only from the 1 level to a higher suit on the 2 level. Jumps to a lower suit on the 3 level are natural and invitational.

Opener can rebid his suit to show 6+, raise responder or bid RKC Blackwood with 3+ support, bid a side suit to deny support and show least KQ in the suit, or bid NT at the cheapest level to show any other hand.

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).

Which of the 4 possible strong jump shift hands does the South hand really have? South has shown type 3 with the 3NT rebid. If South actually had a type 3 strong jump shift, then there's a good chance of 5 or 6 club tricks.

[mycroft]

You showed a hand too strong to bid 3NT, or even 1♥ then 3NT. Something like

---

Now, should partner jump? Well, maybe not, but the ♣Q and we're golden; even without it we should have some play.

GIB plays Soloway Jump Shifts, not just "Strong" J/S. Even with "strong" J/S, there should be some slam interest opposite a decent minimum; your game-forcing 14 count isn't it. But explicitly, 2♥ shows one of three hands:

• A suit effectively playable in slam opposite a small singleton, rebid 3♥;
  
• A chunky two-suiter with hearts and *clubs*, rebid 3♣;
  
• A balanced hand "too strong" to bid NT normally, rebid 3NT.

You have to bid 1♥ and then continue to force. After 2♣, I would guess 2♦ "least lie"; after still no 2♥, 3♣ should show this hand. If GIB(BO) doesn't think so, though, then 3NT I guess and hope.

[johnu]

mycroft, on 2026-January-06, 20:08, said:

You showed a hand too strong to bid 3NT, or even 1♥ then 3NT. Something like

---

You need a rebiddable suit in hearts, so one more heart is needed (and take away a spot card from one of the other suits).

[Huibertus]

johnu, on 2026-January-06, 21:23, said:

You need a rebiddable suit in hearts, so one more heart is needed (and take away a spot card from one of the other suits).

Incorrect.

There are 3 hand types for Soloway jumps.
1. a balanced 18-19 HCP
2. a good 15-18 points and a one-suited hand
3. a two-suiter with a good 15-18 points (the second suit in support of partners opening, can be 3 card after 1♥)

Opener should relay (1♣-2♥-2♠) and then with
1. rebid NT
2. rebid the suit
3. support partner without a singleton, or bid the singleton

The example given is of type 1.

[Huibertus]

Both partners err here. South does not qualify for a Soloway Jump (although south is not far off). North has no reason to bid anything else then the standard 2♠ relay in response to the Soloway jump.

But I'd suggest not to play Soloway jump shifts at all, they eat up valuable bidding space, and as illustrated by this hand for some they are a burden on memory which leads to mistakes.

[mycroft]

What do you play instead?

Sure, everybody has an answer to that. Some of them are even good (most just play "weak" jump shifts and don't talk about what they mean by that. And they have the many 2♥+2s and 3NT or 4♥-1s to prove it).

But GIB/BO's system has a limitation not applicable to "most pairs" - it has to be something "most duplicate players *can* play, even if they wouldn't by preference." So all of those lovely ideas "we" all know about and would recommend (or would not) - criss-cross minor constructive/limit raise, reverse Flannery, mini-splinters, Bergen (ah, which way? Which type? Modified/Collapsed/Extended/...? Do people who play Bergen even know there are other responding schemes?) are probably off the table, and we're back to "weak or strong"?

Now, does SJS (for either expansion of "S") fall into the category of "most duplicate players *can* play"? I'm not sure (any more). I bet almost none of the "we claim to play SAYC" pairs play the strong jump shifts the booklet says they do. So, maybe.

But also, players *don't read* the system hints. I know, because every time I play casual, non-logged-in knockaround with the bots, and the opponents open 1NT, I feel comfortable I'm headed for an above average score because somebody will play 2♦-3 in the 4-1 fit with 2 of a major on, or 2M -1 or just in on the 4-3 fit with 3m cold - because the bot plays Cappelletti, and they don't look. Now, put that into the "what should a jump shift show" and see if anything at all falls out that's better than (the poor thing) what we have now.

[Huibertus]

mycroft, on 2026-January-07, 10:19, said:

(most just play "weak" jump shifts and don't talk about what they mean by that)

Well yes you are right it needs to be discussed. What has been discussed in my partnerships: The requirement is a 6 card suit and less strength then a normal 1 over 1 response needs. So basically 2-5 HCP. No honor requirements in the suit on top of the length of it.

As for you observation on Cappelletti and human players not bothering to find out what system they play you are spot on, I share the experience.

[pescetom]

In defence of the human players who do poorly in Cappelletti with the bot, I would point out that even if you did read the System Notes (which say merely that over 1NT GiB plays Cappelletti aka Hamilton) and the bot's explanation and hover over your possible explanations, it's far from trivial to reach the best (or least bad) contract. Just try figuring out for instance what to do after the bot interferes 2C, even if RHO passes.

[johnu]

Huibertus, on 2026-January-07, 03:00, said:

Incorrect.

There are 3 hand types for Soloway jumps.
1. a balanced 18-19 HCP
2. a good 15-18 points and a one-suited hand
3. a two-suiter with a good 15-18 points (the second suit in support of partners opening, can be 3 card after 1♥)

Opener should relay (1♣-2♥-2♠) and then with
1. rebid NT
2. rebid the suit
3. support partner without a singleton, or bid the singleton

The example given is of type 1.

Wrong.

Quoting from the GIB system notes about Soloway Jump Shifts

Quote

3) Rebiddable suit, 18+ HCP, 4+ controls, 5332 or 6322 shape.

Quote

With type 3, it bids NT or raises NT to game.

When playing with GIB, you have to use GIB's system, such as it is. In this case, I agree with GIB's description.

[thepossum]

cencio, on 2026-January-06, 15:16, said:

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explain me where is the mistake, My bid of 3 nt ?

I cannot fully analyze but despite my own temptations your Soloway was slightly excessive
Just not quite enough even for me
FWIW the way Gib or these days GIBBO randomly change distribution points to HCPS can be annoying
And checking my Soloway you did not have a strong balanced hand. Stay with me
Your bid needed to be 3H if anything - Could quote my sources but as you see I need to check how to bid Soloways
On an irrelevant personal note my eyesight is not great and I often get my suits mixed up these days