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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.

        3       5 7           2
16     9     10       1   6   14  
  7   12   15   6     3     10 5  
    10 6     13   11         8   3
7   14 4     15   12   5   16      
  9 1     11   2 7         15 13 8
  15 6 11           1 2   3      
3 8     12   5 13 15   11         10
1         2   15 8 3   4     10 12
      10   5 8           2 3 15  
8 2 12         3 13   14     4 9  
      3   16   11   5     8 1   14
9   8         16   4     13 6    
  12 2     6     9   15   10   1  
  4   1   7       6     15     16
15           9 5       11        
Showing puzzle number: 18616
Puzzletype: Symmetrical Sudoku
Startnumbers: 104
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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