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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.

      12     13 7   11            
10   11   8 5 9 12     1         6
  9 6     2   3 7 15 5          
    2   15 4     12 6   9     8  
1   15     16 3       8 7   6 5 13
9 12     5 6     3         7 4  
  5 10   9 12 8                 15
      3 1           4     10   9
5   12     10           8 2      
2                 9 15 11   8 1  
  15 1         14     13 4     11 7
4 3 13   11 8       2 14     9   10
  1     12   2 5     6 13   15    
          7 4 8 14   12     13 2  
12         15     10 8 9 1   4   5
            6   15 7     3      
Showing puzzle number: 29230
Puzzletype: Symmetrical Sudoku
Startnumbers: 106
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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