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Sudoku puzzles 4x4 (Su Doku)

My database includes 34183 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 4x4 box contains the digits 1 through 16. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

7414212 puzzles downloaded.

12         1 13 4 7   11   9 3   8
2     14 7         3            
      16 15       5       2 1   11
      3   2   6       14   13   15
            9   13     15 7      
5 6       12   3       8   10    
  3   15   13     6 2       16 11  
            4 15 12     10   8 2 1
10 9 12   14     16 1 13            
  1 7       8 13     9   11   6  
    16   1       14   7       15 3
      2 9     11   4            
3   8   12       11   10   1      
7   4 6       5       12 8      
            11         13 12     14
14   11 13   8   7 2 16 1         10
Showing puzzle number: 16188
Puzzletype: Symmetrical Sudoku
Startnumbers: 98
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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