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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.

7300200 puzzles downloaded.

      16     8       6 9 10      
      2 3 6     7       8 1 11  
6     3 10   7 9   13   1   15   5
  13 1       2 15     3         9
  16 12           8     11 4     6
      9         6     14 2   5  
14 3       4   10       5 1 16    
  8       16   11     15     14    
    6     11     9   14       12  
    14 12 9       5   11       13 2
  5   13 4     14         9      
4     11 7     16           10 14  
7         5     14 11       2 6  
2   3   1   10   13 12   15 14     8
  6 16 8       3     1 2 12      
      4 15 13       8     11      
Showing puzzle number: 22280
Puzzletype: Symmetrical Sudoku
Startnumbers: 100
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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