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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.

3380401 puzzles downloaded.

10 6       9     11   3 15        
  7             4 10     2 5 6  
  14     13         9   7     12  
4 2       11 16   13   12 14        
8   3     16       7     4   14  
1   15     8 4             3    
13       14     10 5     8 15      
14 4     12   3 6   16     8 10   1
9   14 10     2   3 15   13     1 12
      16 10     12 1     9       4
    12             14 6     2   5
  13   2     14       11     15   10
        1 2   13   12 10       9 16
  11     9   6         4     10  
  5 10 14     15 7             4  
        16 4   5     7       8 6
Showing puzzle number: 204
Puzzletype: Symmetrical Sudoku
Startnumbers: 100
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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