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    Bergen Redouble Over Notrump - A method to show opening 1 Notrump 
    partner assurance of a solid contract when intervening opponent doubles to 
    show a one-suited or two-suited hand.  
     Example:
    1N - (X) - XX  shows 6-7 points.   Conversely, when 
        responder does 
    not redouble, making a 1 Notrump contract is doubtful.  However, if 
    opponent's double was penalty-oriented, then responder's calls follow the
    DONT Convention: 
          
        | Bid | Responder's Conventional Meaning |  
        | 1N - (X) - 2C | Clubs and a higher suit |  
        | 1N - (X) - 2D | Diamonds and a higher suit |  
        | 1N - (X) - 2H | Hearts and a higher suit |  
        | 1N - (X) - 2S | Spades (signoff) |  
        | 1N - (X) - 3C | Clubs (preemptive) |  
        | 1N - (X) - 3D | Diamonds (preemptive) |  
        | 1N - (X) - 3H | Hearts (preemptive |  
        | 1N - (X) - 3S | Spades (preemptive) |  Also see SOS 
    Redoubles, Exodus,
        Moscow Escape |