1NT - 2♥ - 2♠ -

pass =    TP

2NT  =    4♠, invitation

3m    =    4♠, longer m, invitation

3♥/♠  =     4♠, longer ♣/♦, GF

3NT  =    4♠, balanced

4♠    =    6+♠, mild SI

4NT  =    quantitative, 4333

back to 1NT - 2♥ -

back to 1NT -