| Grosvenor 
    Gambit - Originally documented as a tongue-in-cheek ploy, a seemingly illogical play to entice the opponent into 
    making a false conclusion about partner's holdings, ultimately leading to 
    defeat.
 
          
        |  |  K 8 7 6 5 
        4 
   
   
   |  |  
        |  Q 10 2 
   
   
   |  |  9 
   
   
   |  
        |  |  A J 3 
   
   
   |  |  Assume the 
        declarer does not have outside entries to run dummy's 
        Spade suit.  Declarer leads the SA and West falsecards 
        playing the S10.  When the declarer follows with the SJ, 
        West refuses the trick by playing the S2.  The declarer 
        logically assumes both opponents have two Spades, winning the trick with 
        the SK in the dummy.  
         However when East surprisingly shows 
        out, West's SQ wins the third Spade trick and declarer is blocked 
        from running the dummy's long Spade suit. |