Cascade, on 2022-February-01, 02:55, said:
Say partner has shown three controls (A=2 and K=1) and then goes four steps in the first denial cue-bid. Say for this example partner is 4=3=3=3. Just explain ♠A ♥K ♠Q and no ♥Q or ♠K ♥A ♠Q and no ♥Q or ♠K ♥K ♦K and no ♠Q. On the second round if partner goes two steps then the first two options are the same ♦Q and no ♣Q and the third option above leads to ♥Q and no ♦Q.
"sAQ hK no hQ, sKQ hA no hQ, or sK hK dK no sQ" isn't too onerous to type.
On the second round it is a little more complex: "With sA or hA then dQ no cQ OR with no ace hQ no dQ".
Maybe. But if you have 4 controls, the scenarios before skipping ahead to Queens are AA or AKK or KAK or KKA or KKKK. Seems like it gets awkward quickly. And if you aren't taking a shortcut scan based on your holdings, I think it could be hard to even remember that you need to enumerate all the possibilities for the opponent, because maybe you could have taken a shortcut with different holdings.