DOBI DOUBLE, over strong 1NT opening

‘memory of my lovely dog Dobi’                   

 

Double of strong 1NT, shows one major and one minor or good hand with long major suit and 8½ tricks, double of weak 1NT is penalty.

 

           Pass    

X                                 ?

          1NT

                                            – 2§                : to play partners minor

                                            – 2¨               : asks for major

                                            – 2M               : natural, good six cards

                                            – 2N                : asks for minor, then if 3©is bid, invitation in majors

                                            – 3M               : game invitation with good long suit

 

           Pass    

X                                 2§    

?                  

           1NT

           Pass

 

– Pass            : shows clubs and a major, not very strong

– 2¨               : shows diamonds and a major, not very strong

– 2©                : shows very good hand with hearts and diamonds

– 2ª                : shows very good hand with spades and diamonds

– 2NT              : shows very good hand with hearts and clubs

– 3§                : shows very good hand with spades and clubs

 

           Pass    

X                                 2¨   

?                  

           1NT

           Pass

 

– 2©                : shows hearts and a minor, not very strong

– 2ª                : shows spades and a minor, not very strong

– 2NT              : shows very good hand with diamonds and a major

– 3§                : shows very good hand with clubs and a major

 

– Over 2NT, 3§ asks for the major; 3M is game forcing!

– Over 3§, 3¨ asks for the major; 3M is game forcing!

  After 3M, partner raises to game or return original minor with other major!

 

           Pass

           Pass    

X                                 2NT  asking for minor

3m                     ?

           1NT

           Pass

                                            – Pass            : to play

                                            – 3©                : game invitation with (4-4) majors

                                            – 3ª                : forcing to game with (4-4) majors

                                                                    (LHO bids 4ª or turns to original minor to transfer to hearts)

 

 

 

 

 

         

           Pass

           Pass    

X                                 2NT 

3m                     3©

 ?       

           1NT

           Pass

 

– Pass            : minimum with hearts

– 3ª                : minimum with spades

– 4©                : maximum with hearts

– 4m               : (turn to original minor) maximum with spades

 

           Pass

           Pass    

X                                 2¨    asking for major

2M                    2NT             invitational relay

           1NT

           Pass

 

If responder uses 2NT, after 2¨

 

– with 5m/4M and minimum, bid original minor

– with 5m/4M and maximum, bid 3NT

– with 5M and minimum, rebid major

– with 5M and maximum, bid other major!

 

           Pass

           Pass    

X                                 2¨    asking major

2M                     3§              choice for minor

           1NT

           Pass

 

If responder redoubles:

          

           XX        

X                                 ?      

                 

           1NT

                                            – Pass                                  : shows one long minor

                                            – Others          : played as in the system

                                                                

 

           XX        

X                                 Pass                        

?                  

           1NT

           Pass

 

– 2§                : normal bid, to give the partner a chance to show his minor suit

– 2¨               : shows long good diamonds and void or singleton club

               if the suit is not very good, must bid 2§ with singleton