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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.

      15 5 1 7   9     10       11
    12   4       14       5 2   8
  2 16     13             10      
              8     15 13   7   6
  1             13 7 11         10
  10 2     3 6   15     5 7 13 4  
  4 9     7 11     3     15 8    
12 7 14   8 5         16         3
16         10         1 8   4 12 14
    13 10     8     16 4     3 7  
  12 4 2 7     1   15 5     6 9  
8         12 2 4             10  
9   15   1 8     12              
      7             10     1 8  
14   5 12       16       15   10    
4       12     5   11 8 9 13      
Showing puzzle number: 12246
Puzzletype: Symmetrical Sudoku
Startnumbers: 100
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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