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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.

7646280 puzzles downloaded.

    16     6 12 15 1       2      
  10 11   14   4 1   15         8  
          11       8 16   10   13  
12     9 5       6             14
5 3   13         8       14      
        11     12   3 1     16   13
    1 12 8   13       15 9 6   5  
7   10 15   14 5       11         2
11         5       6 13   15 7   8
  7   3 2 13       9   14 11 12    
16   6     4 8   2     12        
      14       3         13   2 10
8             2       16 3     6
  6   11   8 3       5          
  9         6   11 12   2   13 10  
      10       11 13 4 6     15    
Showing puzzle number: 22151
Puzzletype: Symmetrical Sudoku
Startnumbers: 98
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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