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    Rule of 7 - When playing a Notrump contract with losers in opponents' 
    suit and insufficient quick tricks to guarantee the contract, considering the Rule of 7 
    is useful to disrupt communications between opponents. 
    To determine the 
    number of holdbacks before winning the trick, subtract your 
    side's combined cards from 7: 
      
        | Rule of 7 | Combined cards in long suit | Holdback = 7 - combined cards
 |  
        | 7 | 4 (as 3 + 1) | 7 - 4 = 3 times |  
        | 7 | 5 (as 3 + 2) | 7 - 5 = 2 times |  
        | 7 | 6 (as 4 + 2) | 7 - 6 = once |  
      This text will be replaced Of course, 
    the Rule of 7 should not be used when the declarer can maximize tricks by 
    immediately taking winners (quick tricks, avoiding suicide squeeze, 
    dangerous opponent 
    marked with cards, etc). |