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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.

7644823 puzzles downloaded.

16 1   5       4     14 15 8     11
  6 3   1   5 13           7    
  15         8 11   16 1   13     12
  11     2   9       4 13 6     1
15       9 12 13           3      
  4   1 5   16   6   12   14   13  
    5   15 8         7 9   4    
  7   8   4   3       16 12      
      16 13       9   11   1   12  
    12   16 9         2 3   15    
  9   4   7   5   10   1 2   3  
      10           15 16 14       7
5     15 4 16       9   12     1  
10     11   6 7   15 4         5  
    9           16 11   8   12 6  
4     3 12 5     1       7   15 2
Showing puzzle number: 16222
Puzzletype: Symmetrical Sudoku
Startnumbers: 106
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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