1NT Opening: 

10-14 HCP non-vul, 13-14 HCP vul: balanced, can be with 5-card suit (4432, 4333 or 5332)

    If opps double, bid your 5 cards suit or pass, if responder and LHO pass, opener bids 5 card suit or redoubles to find best 4-4 or 4-3 fit) If RHO bids, use Lebensohl  

        Answers to 1NT Opening:

2C - Modified Puppet Stayman  -invitational

Bid 2H or 2S with a 5 card major, 3C or 3D with a 5 card minor or bid 2D with any other hand. After 2D you bid 4 card majors up the line. 

                    2D/2H/2S/3C -  after 10-14 HCP and 7-11 HCP  

                                    (i.e. 1NT and 1C - 1NT)         "openings"=sign off ,

                           after 15-19 HCP "opening" (i.e. 1C-1D-1NT)=transfers (3C=inv)

2NT - Game Forcing 

After 1NT - 2NT:
* 3C - Puppet Stayman (the most common rebid)
* 3D - 5 hearts
* 3H - 5 spades
* 3S -lack of 4 card major  minimum HCP
* 3NT - lack of 4 card major, maximum HCP

After 1NT - 2NT - 3C:
* 3D - One or both four card majors
* 3H - 5 hearts
* 3S - 5 spades
* 3NT - Neither 4 nor 5 of either major 

After 1NT - 2NT - 3C - 3D:
* 3H - 4 spades
* 3S - 4 hearts
* 3NT - No interest in a four card major, was interested in a five card major

3D - Minor Suit Slam Try (1 or 2 suited) 

This shows a hand that is interested in a minor suit slam. It is similar to Minor Suit
Stayman. This is bid is game forcing and asks opener to show his shape. 

The responses are: 

3H - At least 4 clubs (then 3S by responder shows interest in diamonds) (4C is then ace-asking bid)
3S - At least 4 diamonds (4C is then ace-asking-bid)
3NT - Neither 4 clubs nor 4 diamonds (4C is then ace-asking bid)

4C - both 4 clubs and 4 diamonds (4H and 4S are then used for ace-asking instead of conventional 4C/4D asking bids)

3H/3S - Forcing 

When your partner opens a Weak NT, and you have a game forcing hand which is
unbalanced and contains at least one 5 card or longer major, you should forego the
2NT response and bid the longer major at the three level. This action is forcing to
game, shows length in the bid suit and asks partner to: 

     Bid 3NT with only 2 card support (4C is then ace-asking bid assuming bid major as trumps)
    Raise to 4 with 3+ card support and minimum
        use 4C ace-asking bid with 3+ card fit and maximum