I read this topic with interest because I raised the question of what various responses mean opposite an opening bid of 1NT when you have 5-4 (or better) in the majors.
http://www.bridgebas...th-both-majors/
In the context of this BI forum I assume that 2
♣♦♥ responses would be the same as with an opening bid of 1NT and that Smolem is not in your tool bag. (and I am not saying that it should be) Then it is logical to assume that 2
♦-2
♥-2
♠-2NT-3
♥ shows 6 hearts and 4 spades. (Since hearts shown twice and spades shown once) 2
♣-2
♦-2
♥ would show 5 heart and 4 spades and this is widely accepted as invitational. If you don't play Smolem (which covers game force hands with 5-4 in the majors), then the sequence 2
♥-2
♠-3
♥raises a vexed question. It would be nice to say that would show 5 hearts + 5 spades, but then what do you so with game force hands with 5 spades and 4 hearts? I will leave that question hanging.
With your hand with such weak spades you could treat it as invitational 5 hearts + 4 spades and so go through Stayman. Or you could game force with 2
♥-2
♠-2NT-3
♥. It looks like a close call.