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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.

7300255 puzzles downloaded.

15     8   16     3   9 13 1      
5             3   10 16     7   13
                  14 11 7 4 3 9  
  11 14 3 1   9   12           16 6
  15           5 10 12 4 8   2   14
  10 12           16   5   6 4    
16       12     1         3   13  
2 4 5 1       11 7         16    
    16         8 14       13 6 2 11
  2   4         6     9       3
    8 15   10   2           9 7  
1   13   7 9 6 16 11           14  
4 5           14   7   12 11 8 6  
  14 3 12 16 13 5                  
9   6     15 10   5             12
      7 3 11   6     15   2     5
Showing puzzle number: 4069
Puzzletype: Symmetrical Sudoku
Startnumbers: 106
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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