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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.

5909900 puzzles downloaded.

              1   4 7 14       6
      4 3   2 12   5       1 16 8
8     12 10       3              
    7 5   16       8 12 11     10 15
6       9   16 13 7         4 12  
      8 6 7 15 14         11   2  
    12     2   3     5   9 14   1
    9 16   12     15   1     6    
    1     15   8     6   10 13    
5   15 11   9     12   16     8    
  8   10         5 3 11 15 1      
  9 13         11 14 7   1       16
15 10     12 6 13       4   14 3    
              15       6 5     4
7 11 6       9   16 10   5 12      
14       1 10 3   8              
Showing puzzle number: 19605
Puzzletype: Symmetrical Sudoku
Startnumbers: 104
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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