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Vulnerable - A Vulnerable condition 
    may occur on one, both, or neither side of the table, depending on the 
    hand in a match.  In Rubber Bridge, the state where the side has won a 
singular 
    game.  In Duplicate Bridge, the condition where the side will enjoy a 
    higher game or slam score, but incur additional penalties for a failed 
contract. Vulnerable is sometimes 
referred to as the color "red".  Thus, "Red versus Red" means both sides 
are Vulnerable. 
    Vulnerability By Board - 
      
        | North | 1 None
 | 5 N-S
 | 9 E-W
 | 13 All
 | 17 None
 | 21 N-S
 | 25 E-W
 | 29 All
 | 33 None
 |  
        | East | 2 N-S
 | 6 E-W
 | 10 All
 | 14 None
 | 18 N-S
 | 22 E-W
 | 26 All
 | 30 None
 | 34 N-S
 |  
        | South | 3 E-W
 | 7 All
 | 11 None
 | 15 N-S
 | 19 E-W
 | 23 All
 | 27 None
 | 31 N-S
 | 35 E-W
 |  
        | West | 4 All
 | 8 None
 | 12 N-S
 | 16 E-W
 | 20 All
 | 24 None
 | 28 N-S
 | 32 E-W
 | 36 All
 |  For those so 
inclined, here is a memory aid to determine who is vulnerable on a given board - 
notice how the acronym letters rotate left for each four board round (the left 
most letter rotates to the right): 
      
        | Boards | Acronym | Board |  
        | 1 | 2 | 3 | 4 |  
        | 1 - 4 | O
        N
        E
        B | O = Zero | North | E/W | Both |  
        | 5 - 8 | N
        E
        B
        O | North | E/W | Both | O = Zero |  
        | 9 - 12 | E
        B
        O
        N | E/W | Both | O = Zero | North |  
        | 13 - 16 | B
        O
        N
        E | Both | O = Zero | North | E/W |  Jargon terms associated with Vulnerability -   |