Opener

Pass

0-6

Don't even try

Preempt

6-11

6+ for non-vulnerable

9+ for vulnarable

Opening bid

12+

You can open with 11 points on 3rd/4th seat

balanced

1NT

15-17

Don't bid 1NT if  you have singleton

Bid a suit

18-19

Bid one level suit

first then

bid 2NT

2NT

20-21

Don't bid 2NT if  you have singleton

2C

22-24

Bid 2C

first then

bid 2NT

3NT

25+

Don't bid 3NT if  you have singleton

Response

Staymen

8+

2C

Forcing

(asking for 4 card major)

2C>2H>3H

2C>2H>1NT

Transfer

0+

needs 5+ of a major suit

UN-balanced

12-21

Minor   -     1C=2+C   1D=4+D        Major   -   1H=5+H   1S=5+S

re-bid - 1 level

12-15

1C >1H>1S

1C>1D>1NT

1H>1S>2H (6+H)

Raise 1C>1H (6+pnts 4+H)>2C/2H(4+H)

Lower Suit at 2 level   1D>1H>2C

re-bid - 2 level

17-21

Jump bid

1C>1H>3H      1C>1H>3C

1C>1H>2NT     1C>1H>2D

1H>1S>3H (6+H)   1H>1S>3C (5+C)

1H>1NT>2S (4+S)   1S>1NT>3H (5+H)

22+

Bid 2C - Promising 8.5 tricks - Forcing

Partner's point

0-8

2D (waiting)

2H (shows bad hand without AorK

Partner's point

9-14

2S/3H/3C/3D(5+)

2NT