Frank_lol_, on 2023-January-30, 07:37, said:
Yes, but total points, not hcp. (Very important!)
Frank_lol_, on 2023-January-30, 15:38, said:
But 1NT would denies 4S for us. And if I go through 1NT, it would mean good 6-9 with 2 card support or 5-7 with 3 card support, which makes the opener's life a bit harder.
In standard 2/1,
1M-1N; 2m-2M
and
1♠-1N; 2♥-2♠
is either (possibly false) preference with doubleton support (and ~ 5-9 hcp) OR something like 5-7 total points with 3c support. Over this, Opener bids exactly as he would if Responder's rebid had denied 3c support.
It's obviously possible to play
1♥-1♠; 2m-2♥
the same way.