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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.

    16   1 14 10   15         13   12
11 10       2 13     3   12   14   6
      15 6       5   10         7
      2 12 9 7 5       13     15 3
10         11 5       1     2   4
  7 1     3 16   11   5   15 12    
    3 8       10   4         1  
4         1       6 9 3 16   10 14
2 9   13 16 10 11       15         1
  8         2   6       4 15    
    11 12   15   1   10 16     8 14  
16   5     12       2 7         10
8 2     3       16 14 11 4 6      
12         5   4       7 10      
1   7   10   9     8 2       3 15
3   9         14   1 12 5   4    
Showing puzzle number: 25821
Puzzletype: Symmetrical Sudoku
Startnumbers: 110
Difficulty: Super easy (0)
Solution methods: SiSo
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