2♦ - 18+ unbalanced or a 4 losing trick, or 21+ balanced

The next bid provides a count of controls. A=2 points and K=1

Any bid over 2 hearts requires a second bid from responder if there is any interference treat it as DOPO

 

 

2♥ - 0/1 Controls

 

2♠ - 2 Controls

 

2NT - 3 Controls

 

3♣ - 4 Controls

 

3 - 5 Controls

 

3♥ - 6 Controls