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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.

7610484 puzzles downloaded.

    15       13     9     1 2 3 10
      3 9           13 15     14 6
      1       7 12 6         5 16
4       15   14 12                
3   12           5         1    
  16   8           7   11   12 2  
      2 7   8 11 13   12 4 10   9  
      4   12 2   14   16     6 8 5
8 2 7     5   3   1 9   6      
  3   14 10 7   8 4 13   12 2      
  12 4   14   9           3   10  
    6         2           14   7
                1 3   8       13
9 8         1 15 16       7      
13 10     8 14           6 15      
6 4 16 11     12     2       9    
Showing puzzle number: 15953
Puzzletype: Symmetrical Sudoku
Startnumbers: 100
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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