Slamhound, on 2025-August-18, 03:10, said:
Like you, I don't like jump-shifts because of the space consumption but this is an ideal hand. You should end up in NT if opener has 4 spades, or hearts if he holds 2+, or diamonds if he takes out your hearts to 3D. Whether he bids diamonds or spades, he will usually have 4, so holds either a very unusually shaped strong club hand if he repeats clubs, or one he can reverse, also strong. Slam is almost guaranteed as you hold a 4-loser hand opposite a 7-loser hand, and two good suits (jump-shifts usually hold only one).
While strong jump shifts may have been played by most people maybe 50+ years ago, they are played by a minority of experts these days.
For those who do play strong jump shifts, most play a version of Soloway jump shifts. In Soloway jump shifts, you have 3 types of strong hands.
1. Independent single suit
2. Good suit, with 4+ card support for opener's opening bid suit
3. Good suit, NT type of hand.
Jump shifting with a 2 suiter is not done, because jump shifting takes up an extra round of bidding when you haven't found a fit yet.