Rule of 11
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Rule of 11

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In bridge, the rule of 11 is applied when the opening lead is the fourth best from the defender''s suit. By subtracting the rank of the card led from 11, a defender can figure out how many cards are higher than the card partner has led. The rule works because the defender is known to have three and exactly three cards higher than the card led. When West leads the 7 East applies the rule of 11. This shows that there are 4 cards higher than the 7 that dummy, declarer an...