FelicityR, on 2020-July-18, 11:00, said:
It's easy to talk yourself of opening 2♣ here, and whilst the hand is only four and a half quick tricks and comes out at a tad over 21 on the Kaplan and Rubens evaluator, those two Jacks in ♠s and ♦s adjacent to another honour give it more body. However, even though I agree with shyams, it is a borderline case.
I'm not so convinced though opening 2♣ and rebidding 2♠ is the best way to treat this hand. Maybe opening 2♣ and rebidding 2NT is better because that is the only 2♣ opening sequence that can be passed if partner has a Yarborough.
Puppet Stayman after 2NT will find the 5-4 ♠ fit on the two hands shown if you are using that convention.
2
♣ followed by 2
♠ is GF for many people, if you play 2
♦ better than 2
♥ this might be justified, but if you can catch the small hand without the K
♣ then it's far too much.
Don't need to be playing puppet stayman, any of the 5 card methods will do (we play 5 card non puppet).
+++++++++++++++++++++++++++
As opener, I rank
1. 2♣ = ART. Intending to rebid 2♠.
2. 2NT = BAL. 20-21 HCP. Underbid.
3. 1♠ = NAT. Gross underbid.
As responder to 2NT, I rank
1. Pass = NAT.
2. 3NT = NAT. Overbid.
3. 3♣ = ART Staymanic.