1♣ - 1♦ -

1♥    =    2-3♥, 11-13, does not deny 4 card ♠      ➲

1♠    =    4135/4036, 11-17 or 4315/4306 , 14-16    ➲

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

2♣    =    5+♣, 11-15, denies 4 card ♠ and 3 card ♥; RE responses natural, except 2♦ = artificial GF, natural continuation

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

2♥    =    11-13, 4 card ♥

2♠    =    reverse, 18+

⚠️2NT =    6+ ♣, 17+    ➲

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

⚠️3♦    =    4♥4+♣, 14-16, unbalanced; in continuation 3♥ shows minimum, else = cue

3♥    =    unbalanced, 11-13 

3♠    =    splinter, 17-18

back to 1♣ -