Key Card Swiss
     
 
to conventions this page was last updated: 21-Oct-2006
 
     
 
 
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Key Card Swiss

 
  Keycard Swiss is just one of the conventions intertwined in the Raising Partner's major suit opening section of this web site.  
     
 

It is defined as a jump to 4 or 4 over partner's 1/ opening. It is 12-15 points with 4 card (can be 5 card) support for partner. With a hand of 16+ points it's best to use the Jacoby 2NT convention. The distinction between the 4 and 4 bids is as follows: -

 
     
 

4 = Two key cards + a feature. The feature may be one of the following: -

 
     
 
-1- A third key card
-2- The queen of trumps
-3- a singleton
 
     
 

After the 4 bid, opener may sign off in 4 of the agreed major if he has a weak hand. With slam ambitions, he normally enquires about responder's feature as follows: -

 
     
 
After a 1 - 4 , 4 enquires: - After a 1 - 4 , 4 enquires: -
       
4 = the Q 4 = singleton
4 = singleton 4 = the Q
4NT = a 3rd key card 4NT = a 3rd key card
5 = singleton 5 = singleton
5 = singleton 5 = singleton
 
     
 

If responder has a game forcing hand with a singleton he could have shown it directly by splintering. However, should he happen to have 12-15 points and two key cards, it is more descriptive to use Key Card Swiss. Should he have a void, then it is better to show it directly by splintering (Ambiguous Splinter) whatever the point range, so a shortage bid shown by Key Card Swiss is always a singleton.

 
     
  Example 1  
     
 
West East West   East   (1) Key Card Swiss
                (2) feature?
KQ653 AJ42 1   4 (1) (3) singleton
J85 3 4 (2) 5 (3)  
KJ9 AQ86 6   pass    
AK Q432          
 
     
  Example 2  
     
 
West East West   East   (1) Key Card Swiss
                (2) feature?
KQ653 AJ42 1   4 (1) (3) singleton
J85 Q432 4 (2) 5 (3)  
KJ9 AQ86 6   pass    
AK 3          
 
     
  Example 3  
     
 
West East West   East   (1) Key Card Swiss
                (2) feature?
K10653 Q742 1   4 (1) (3) trump queen
K85 AQ32 4 (2) 4 (3)  
KJ9 AQ8 6   pass    
AK 63          
 
     
  Example 4  
     
 
West East West   East   (1) Key Card Swiss
                (2) not interested
K8653 Q742 1   4 (1)  
K85 AQ32 4 (2) pass    
KJ9 AQ8          
K7 63          
 
     
 

Now what about the direct 4 Swiss bid? After a 1 / opening: -

 
     
 
4 = 4 card support, 12-15 points but lacking the requirements for 4.
 
     
 

After the 4 bid, opener may sign off in 4 of the agreed major if he has a weakish hand. With slam ambitions, he may cue bid or enquire about partner's key cards.

 
     
  Example 5  
     
 
West East West   East   (1) Key Card Swiss
                 
KQ653 J742 1   4 (1)  
J85 A43 4 (2) pass    
KJ9 AQ8 6        
AK Q63          
 
     
 
(2) Here the West hand is not good enough to look for slam. There is a key card missing and also probably a loser or two.
 
 
     
 
Example 6 But with a stronger hand West can make a try: -
 
     
 
West East West   East   (1) Key Card Swiss
                (2) RKCB
KQ653 J742 1   4 (1) (3) 2 key cards
K85 A43 4NT (2) 5 (3)  
KJ9 AQ8 6   pass    
AK Q63          
 
     
 
Example 7 Give East a less suitable hand and we can stay low: -
 
     
 
West East West   East   (1) Key Card Swiss
                (2) RKCB
KQ653 J742 1   4 (1) (3) 1 key card
K85 QJ3 4NT (2) 5 (3)  
KJ9 AQ8 5   pass    
AK QJ3          
 
     
     
 
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