These puzzles are Copyright © 2007 by James Dow Allen

Nurikabe #6 and Nurikabe #7

There is a unique solution with "1" in the lower left corner (Nurikabe #6) and a unique solution with "2" in the lower left corner (Nurikabe #7).
 
 
     3      1
  8       1  
       6     
    1 1     2
1            
    3  2 1 2 
  2   1      
1        4  1
       3     
          3  
  4  8  3    
    2 1      
1 / 2          2 

 
 
Rules:

  1. Paint some unnumbered cells black to form one continuous black chain.
  2. Remaining cells form white chains, each containing one numbered cell, and exactly as many cells in total as that number.
  3. Diagonal connections do not link chains.
  4. No 2x2 square may be entirely black.

 
 

Here is the puzzle in a format you may find more convenient:
 
  

   .  .  .  .  .  3  .  .  .  .  .  .  1 
   .  .  8  .  .  .  .  .  .  .  1  .  . 
   .  .  .  .  .  .  .  6  .  .  .  .  . 
   .  .  .  .  1  .  1  .  .  .  .  .  2 
   1  .  .  .  .  .  .  .  .  .  .  .  . 
   .  .  .  .  3  .  .  2  .  1  .  2  . 
   .  .  2  .  .  .  1  .  .  .  .  .  . 
   1  .  .  .  .  .  .  .  .  4  .  .  1 
   .  .  .  .  .  .  .  3  .  .  .  .  . 
   .  .  .  .  .  .  .  .  .  .  3  .  . 
   .  .  4  .  .  8  .  .  3  .  .  .  . 
   .  .  .  .  2  .  1  .  .  .  .  .  . 
   1  .  .  .  .  .  .  .  .  .  .  2  .

 
 

These puzzles are Copyright © 2007 by James Dow Allen