1♣ - 1♥ -

1♠    =    2-3♠, 11-13,  does not deny 4 card ♥ or 5+♣3♠, 11-15     ➲

1NT    =    17-19, balanced, denies 4 card ♠      ➲

2♣    =    5+♣, 11-15, denies 3 card ♠;  RE responses natural, except 2♦ = artificial GF, natural continuation

2♦    = reverse  or 4 card ♠ 17-19 balanced or 17+ unbalanced      ➲

2♥    =    reverse, 16+

2♠    =    11-13, 4 card ♠

⚠️2NT    =    6+ ♣, 17+      ➲

3♣    =    14-16, 6+♣, RE can pass, if not, then F4♣

3♦    =    4♠4+♣, 14-16, unbalanced; next  3♠ shows minimum, else fit and control

3♥    =    splinter, 17-18

3♠ = unbalanced, 11-13