Decisions, decisions

[HeartA]

2♦ seems clear, you can bid 4♠ next round.

Well, pd might think 4S was to play and pass with 3♠s and 2♦s. :(

[kenrexford]

Some of the analyses have hit on some good observations, most notably that from Inquiry. That being said, it is particularly difficult to answer this question without knowing more about the systemic approach.

 

What, for example, are the requirements that you have for a fit-jump? Are there follow-up auctions to explain your hand? Can you unravel the hand after 3♦ sufficiently? I mean, if 3♦ shows a semi-solid trick source (three of the top four diamonds, and 5+ in the suit) with good trumps (two or more top honors), with a concentration of values (no key honors outside), this is a good sart for the fit-jump. If partner usually bids 3♥ to allow completion, perhaps 3♠ would identify a stiff or void by you, isolating a probable lack of club control, a good second step. If Opener can then cue 3NT with one top trump and the missing diamond, then 4♣ instead would seem to deny this and be assured. Maybe this allows you to cue 4♦, LTTC, showing extra's. Even after a sign-off, your 4♠, a void, would clarify this hand quite well. So, parameters and follow-ups are key.

 

What about 2♦? If your agreements would allow you to clarify three of the top four diamonds, a spade void, no club control, at least two top hearts, plus extra's (sixth diamond, third top heart, whatever), then 2♦ would initiate only auctions where you do not have that hand. If 3♦ initially could not be unwound to show this hand, then 2♦ may be the only alternative. However, a one-under 2/1 is guaranteed to result in trumps being set at the three-level. Partner will dislike his hand, as noted, and space is greatly consumed.

 

In the end, it seems to me that 3♦, a fit-jump, is a call that you came up with as an interesting treatment for difficult hand like this. Use it. However, define it and create auctions after it to handle only those hands that are unsuitable for an auction initiated through 2♦. COV makes sense. If COV is the idea, then facilitate shortness indications or similar case-specific alternatives.