Jump shifts

[Rossoneri]

What do you play them as? Just want to hear some ideas.

[jillybean]

I understand them as strong but I can't remember the last time I used it.

Have a look at this discussion

 

http://forums.bridgebase.com/index.php?act=ST&f=5&t=10940

[kenrexford]

I've been using an "intermediate" jump shift (not in comp) for some time now. (In comp, there are many tools I prefer, like fit-showing jumps and the like).

 

By "intermediate," I mean about 8-11 HCP's, a "good hand ggod suit" response to Ogust if you will.

 

The merits and changes:

 

1M...2M is now weak, like a preemptive J.S.

The intermediate preempts with a punch -- if the opponents step in, we have more defense.

The intermediate is better at protecting against preemption from fourth seat.

 

Not sure if this is actually beter. I just have liked the change.

[paulg]

We play:

 

1♣/1♦ - 2M = 0-7 HCP, 6+ cards

1♣ - 2♦ = 0-7 HCP, 4+♠, 5+♥

1♥ - 2♠ = 0-7 HCP, 6+ cards

 

We would prefer to play 1♣-2♦ as a multi, and the 2M responses as both majors with different ranges. However, although legal in England and Scotland, this scheme is not permitted at Mid Chart so we play the above.

[zasanya]

I play it as 16+.I have experimented with fit jumps ,mini splinters,weak jump shift.In my opinion minor suits hands with 16 + hcp are best described by jump shift .All other hand types can be described in different way but 16 + minor suit hand is very difficult to describe without jump shift.

[kenrexford]

I also recently tried a non-fit-showing jump shift approach by a passed hand, which seemed to work well and seemed to cover problem hands better. Always showing just under a Rule-of-Twenty opening, 5-5 or greater.

 

In case anyone is interested:

 

P-P-1♠-P-2NT = minors

P-P-1♠-P-3♣ = clubs and hearts

P-P-1♠-P-3♦ = diamonds and hearts

P-P-1♥-P-2♠ = Spades and a minor (2NT asks for the minor)

P-P-1♥-P-2NT = minors

P-P-1minor-P-2♥ = 5♥/4+♠, weak

P-P-1minor-P-2♠ = 4+♥/5♠, just under opening

P-P-1minor-P-2NT = minors, longer in other minor

 

If P-P-1minor-1major-?, then Other Major at two-level shows that major plus the other minor.

[ArcLight]

In teh context of 2/1, as expalined in Miek Lawrences CD, there are 2 types of Jump Shifts.

 

1> Interemdiate jump shifts, showing 9-11 and 6+ cards

These will be in the form 1♥ - 3♦

 

 

2> Soloway (i.e. Strong) Jump shifts in 3 varieties

- 18-19 Balanced with stoppers

 

- a great independendent suit, does not promise a huge hand

pard opens 1♦, you bid 2♥ with

♠ x

♥ A K Q x x x x

♦ x x

♣ A x x

 

- a hand with a good suit and a great fit for pard, again this does not promise a great hand. 1♥ - 2♠

on:

♠ A K Q x x

♥ x x x x

♦ A x

♣ x x

 

 

After your jump shift your next bid identifies the type of SJS you have.

rebid your suit, NT, or pards hand.

You will never play in a suit other than yours or pards bid suit.

5-5 hands aer usually not suited

[EricK]

Strong if the jump can be made at the two level, intermediate if the jump has to be to the three level.

 

There is not enough room after a jump to the three level to differentiate all strong hands, whereas a simple 2/1 gets much of the strength across anyway. So I don't believe strong jump shifts to the three level are a good idea. But since a 1/1 can be very weak, I believe it saves room in the long run (and makes bidding easier) if the strong hands can immediately show themselves with a jump to the two level.

 

This is all of course by a non-passed hand. Jump shifts by a passed hand are fit showing (ideally a 5 card suit, 4 card support for opener and a maximum initial pass)

[BillHiggin]

I can be quite flexible about jump responses to the 3 level (Bergen, strong, weak, intermediate, whatever partner loves). This also applies to 2♦ over 1♣.

 

I will lobby hard for 2♥ over 1m as responders reverse flannery (less than invite, 5♠ and 4♥).

 

I will strongly argue that 2♠ to 1♥ opening at least include game forcing heart raises which include spades as a source of tricks (It is a giant hole in 2/1 to respond 1♠ to 1♥ and then try to show a game forcing heart raise - too many ways that partner can prevent you from showing that below 4♥). Soloway jumps do include this case. (I am willing to "kickback" the 2N forcing raise and use 2N to show some set of hands that include the forcing ♥ raise with spades as a source of tricks).

[Gerben42]

I'm becoming a big fan of intermediate jump shifts, only on the 2-level of course (on the 3-level I play them as artificial raises of the opened suit).

 

2nd choice weak but constructive (5 - 8 HCP).

 

The reason is that these two meanings have the biggest upside for when you DON'T bid them.

[Double !]

If given the choice, I Strongly prefer strong jump-shifts by an unpassed hand and as a fit raise by a passed hand (part of the bidding dinosaur in me). With a couple of friends we combine the two so that the jump-shift is either a fit-raise after 1m, or strong. IMO, there are just some hands that one needs to be able to get off one's chest quickly in terms of strength because otherwise one just can never catch up in the bidding with much confidence.

 

I am starting to look at Reverse F-word as a possible alternative if I can still have a way of handling strong J-S hands (a work in progress).

I don't play invitational jump-shifts (although I can) because they are not needed when playing 2/1 GF except for suit rebid by responder.

 

I have no problem playing disciplined weak jump shifts (3-6/7), like a mini weak-2 bid. And it does fit in well with clarifying ranges when the suit is rebid. The problem is that others don't seem to want to be willing to maintain the discipline. So, to each their own.

 

dhl

[skjaeran]

Over 1♣ I play transfers at 2-level. 2♦/♥ are transfers to ♥/♠, showing either a wjs (3-7) or a sjs (15/16+). 1♣-2♠ shows a unbalanced (semibal) 9-11 raise.

 

Over 1♦ I play wjs. And 1♦-3♣ same as 1♣-2♠ above. I might change this to the transfers used over 1♣, and let 1♦-2♣ be 2-way - GF with ♣ or ♦.

 

Over 1M the jump responses are conventional raises (a combination of minisplinters and Berger) of the major.

[awm]

Over 1M, I have a preference for:

 

(1) Strong jump shifts if playing non-game-forcing 2/1s. This is because one-suited slammish hands are hard to describe if bidding and rebidding my suit is non-forcing.

 

(2) Invitational jump shifts if playing game-forcing 2/1s. In such a system, it's easy to show a one-suited slammish hand (bid and rebid your suit) but distinguishing a weak one-suiter from an invitational one-suiter is hard (both have to start with 1NT forcing). Invitational jumps work a bit better than weak jumps, because you're more likely to have a decent suit (playing a 6-1 with a lousy suit at the three-level and 19 or so hcp is not my idea of fun).

 

(3) Wide-ranging weak jump shifts if playing a limited-opening system. If 1M maxes out at around 15, then there are lots of hands where you can't really imagine making game unless you have a big fit (basically 0-9 hcp). This means you can use jump shifts as "to play" without any real fear of missing a game (yes partner can still raise with a fit and some shape, this is virtually always the right action even if it leads to a failing contract). Using jump shifts as "to play" over a standard opening basically means the range is 0-5, which is too little to have a decent suit most of the time anyway.

[Guest Jlall]

Strong if the jump can be made at the two level, intermediate if the jump has to be to the three level.

Yeah I like this too, but am also playing 1C-2D and 1D-2H as multi-way (including a strong jump shift and 11-12 balanced and with some partners a constructive minor suit raise).

[the hog]

Intermediate in the minors, strong in the Majors. Not in competition btw.

[Impact]

Over Majors:-

 

SingleRaise+1= fit with singleton (no good long sidesuit)

next bid (SR+2)=fit showing jump in that suit OR suit one under Trumps of either limit or minimum GF (stronger hands via relay)

SR+3= fit-showing jump strength as per above

SR+4= limit

double raise (DR)= "pre-emptive"/mixed

DR+1=minimum GF fit balanced (stronger via relays)

DR+2/3/4= switched (one under) void-showing splinters of minimum GF strength with no good side-suit

 

 

Note I do not need strong jump shift as transfers over Major suit openings with the single-suited (self-supporting) GF and outside shortage which will make slam opposite no wastage (again next jump is switched splinter for own suit)

 

Over utility bid:

 

2M=natural good suited weak 2 playable opposite misfit in terms of suit

3minor to play

2NT= at least 4-4minors pre-emptive (as guarantees fit)

 

 

(many possibilites after start with relay)

 

Playing standard many years ago: similar to Soloway Jump-shifts

 

In a Blue Club context their JS have much to recommend them in that the single-suited hand missing a key Honour singleton is located immediately...

 

 

My view is that modern bridge should focus on getin get out quickly with fit - hence the orientation prefered over Majors - and that is FAR preferable to points and 4 card support!

 

regards

[Robert]

Hi everyone

 

I play a Precision type system with weak jump shifts in the majors(0-9HCP)

 

Jumps to 3m are invitational(except 1D-3D) 6+ cards.

 

This permits a major reply and the suit rebid at the 2 level to be invitational.

 

Since the bids appear to work well, so I am also trying them in my standard base bidding. I really like to be able to rebid at the two level and still show my inv. type values.

 

Regards,

Robert

[helene_t]

I try to avoid strong jump shifts. It's one of the things I bring up even when I pick up some unknown partner for a small BBO tourney, two minutes before start.

 

The reason is that I have no idea how the auction develops after a SJS. So I'd rather play no jump shifts at all than strong jump shifts.

 

Of course jumps in response to a t/o double cannot be weak, and there are certain situations where you need to play them strong or intermediate jumps because a non-jump would be NF, such as in Fantunes. But when a simple shift would be forcing, there are many reasons to prefer jumps shifts to be weaker:

- If not overlapping with your preempt structure, they can be used by a passed hand so no need to play different systems in different seats. This may be a case for playing them as fitbids, minisplinters, two-suited, or ultra-weak.

- They come up more frequently

- With a strong hand you can always bid again, usually even if partner or opps block your natural rebid. You'd like to show a hand that has the distribution to bid twice but may be too weak for that.

- They can win the board when it belongs to the opps

 

With my regular IRL p, I play classical precision. Jump shifts are generally semi-positive (even in response to 2♣, we play simple shifts as forcing here). The expections are 1♦-2M and 1♥-2♠ which are ultra-weak, 1N-3♦/♥/♠ which is forcing because we play weak t/o at the 2-level.

 

With my semi-regular (system freak) IRL partner, I play Boring Club with jump shifts being generally ultra-weak at the 2-level and minisplinters at the 3-level.

 

By an unpassed hand, I think 4-7 or 9-11 is more useful than 0-5 because of frequency and because of the negative inference when you don't use them. I agree with Gerben here.

 

Playing 2/1 100% GF with a non-forcing 1NT, the 10-12 semipositive 1M-3m shifts are mandatory I'd say since with such a hand you may want to be in game opposite a balanced minimum (which would pass a 1NT response) but not necesarily oposite an unbalanced minimum.

 

Having read the Robson/Segal book, I'm getting more sympathy for fit-showing jumps. They can be used by an unpassed hand as well, especially if you don't play Muiderberg.

[blackshoe]

Romex has very specific requirements for SJS, and for the follow on bidding. For example, the SJS suit will have at most one loser, and opener's first priority is to raise if he has the missing honor. There's more, of course. :P

 

I suspect that if Robson and Segal ever get their "not in competition" book published, we'll find they like fit showing jumps in at least some of those auctions as well, even by an unpassed hand.

[ochinko]

I play weak jump shifts at the level 2. They have nice preemptive value, and allow you to overbid early in the bidding rather than late.

 

You can bid a 6 card suit with 0-4, or bad 5/6 points, enter and exit the bidding in a jiffie, informing partner about your strength and shape, and stealing bidding space from opps. They also give partner a chance to consider a sacrifice.

 

There's nothing like it. I can understand the merit of intermediate jump shifts, but strong ones seem pointless and antiquated. They are remnants from the times when 1 over 1 wasn't forcing.

[Cascade]

I play :

 

1. Fit showing jumps over a minor

 

Well actually only 1m 2M.

 

1♣ 2♦ is any invite with clubs

 

1♦ 3♣ is a splinter

 

The fit jumps are an excellent springboard for slam (and game).

 

More specifically we play

 

1m 2M = 4+ m 4+ M and 10+ hcp

 

2. Splinters over a Major

 

1♥ 2♠ = balanced raise

 

1♥ 2NT = spade splinter

 

otherwise the splinter is in the suit bid.

 

These splinters are invitational or better.

 

The extra bidding space available after a splinter below 3M is invaluable. On slam auctions we are frequently showing queens below game.

[Gerben42]

I play:

 

1♣ - ?

* 2♦ = nat. GF unbal.

* 2♥ = 5♠ 4♥

* 2♠ = Minors

 

1♦ - ?

* 2M = Inv. Jump Shift

* 3♣ = Mixed ♦ raise

 

1M - ?

--> See "improving 2/1 GF" by FG :P, i.e. cheapest JS = Jacoby, Bergen, 2NT nat. GF.

[mike777]

Prefer to play neither weak nor int. nor strong jump shifts assuming the opp are silent.

 

For the most part my jump shifts show various raises of one kind or another of opener's bid suit or 1minor=2h=reverse flannery.