[waychan]

2H = weak two

[han]

How about other: control ask. Partner will bid the first step without a control, second with a second round control, and third with an ace or void.

[flytoox]

You definitely need discussion with pd about this. I would take it as splinter without discussion. There is a same thread about this in the google bridge group.

[mr1303]

Mike Lawrence recommends this as a modified version of RKCB. Responses are:

4D = 0
4H = 1
4S = 1+ Q
4NT = 2
5C = 2+ Q

[inquiry]

Splinter makes no sense... the reason being, if there is a slam at hand, odds are that the stronger hand (the one bidding 4♣) should be finding out about his partner's hand, not the other way around. On a "scientific side", modified RKCB makes sense, but on practical side, the best use of this bid is a fit jump, promising good clubs, and a heart fit. The idea is to prepare yourside for a possible 4♠ bid over 4♥. The bid shows values for game, establishes a forcing pass situation (something a direct jump to 4♥ would not) and puts the opening preemptor into the picture so he can help make a decision over their 4♠ bid. This is much more useful in the long run than rkcb or splinter. Of course, when you have a hand were you would like to splinter or ask for keycards below game, then the other bids would be nice to have...but frequency issues suggest fit jump more useful a larger percentage of times.

Ben

[Chamaco]

I Like Anderson/Zenkel's suggestion of Jumps being CABs (control asking bids)

[Free]

Fit showing for me.

[Fluffy]

Fit bid to me also (some kind of lead directing as well but primarilly it is fit showing)

Asking bids or anti-cuebids (you bid the suit you do NOT control) are good when partner opens 4M, and playable when opens 3M, but over 2M you have a full level to describe a good suit with forcing new suit, or about specific controls with 2NT, you can cuebid later.

[slothy]

i used to play this as exclusively splinter bids.....

....but now play it as jump-fit with slam interest...

Recently, in response to the psychological damage incurred from bidding an unmakeable slam and missing a cold one in the same session of a tournament and our team opps reversing this unfortunate arrangement i changed it

Obviously more important that it is slam-sniffing rather than preemptive (as i remember was discussed in one thread? and dont see the merit of it)

Telling your p WHERE your points are and trick-taking ability makes it much easier for him to assess his own hand. Saying you have a singleton/void reflects your ruffing potential but makes it (more) difficult for him to assess his losers in other suits, and maybe in the one splintered even... (even though your bid suggests you have length in others)

You can always Q your singleton later...trying to telegraph an important good stuffing in a suit which may be what partner needs to hear is impoosible over a splinter and can only be shown with a double Q

[pclayton]

I play fit jumps in every other jump shift auction except this. 4♣ as key card (01122) is a nice little adjunct, thats a little more useful than a fit jump. Once the auction gets by RHO, the need for competition is diminished, and the need for constructive bidding is increased.

[inquiry]

I used BridgeBrowser to examine some 2H/2S - 4C/4D auctions from the BBO to see how people play this. To my surprise, the most common use for a jump to 4C/4D was natural and forcing with suit bid (wihtout support for the weak two suit). Go figure... here is the results of my non-scientific study (note, I had to try to figure out what some of these bids meant, so maybe more of the 4C I counted as ace asking than belongs... even looking at the hands it was often hard to figure out why someone would bid like that....

Preemptive in bid suit - 11 times. 8 of these times the opener clearly had no clue it was meant as preemptive.

Splinter - 22 times. Three of these times they had no idea it was splinter (twice lettting splinter bidder play in the short suit, once raiing to game in it.)

Fit jump 26 times. opener passed this jump five times, and raised it once rather than signing off correctly in the major

Ace Ask, looks like 29 times. Opener passed this jump 5 times.

Forcing in suit bid, 43 times. Opener had no clue what was going on at least on 7 of these hands.

Total psyche, fit no real values, 4 times. For whatever reason this unalerted, non-sense psyche worked on each hand.

Ben

[hrothgar]

Within the conext of a standard system, I prefer that 4♣ = modified RKCB with
other 4 level jumps used as Control Asking Bids

[Double !]

Have usually played Jump-shift response to weak 2 as a control asking bid with some idea where the contract is headed depending on partner's response.

[mr1303]

Whatever 4C is meant to mean, I wouldn't bid it unless I had specifically discussed what it would mean with a partner.

No wonder people have done all sorts of random things after it. Without any discussion I would probably pass it as well, and tell partner off for making stupid random bids that don't have any agreement.