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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.

5331353 puzzles downloaded.

12 1         14 9 3             8
  11 10       1   16 15       9 6 2
      6       11       14   3 1  
  9 8 7   4     1 11   5 14 10    
  4   11   14     10 1           15
      13     7   2   11          
    14 12 4 3   10   13 9   16   2  
  2       6           3   13 7  
  7 12   2           5       8  
  10   5   12 8   13   14 11 4 7    
          13   4   16     6      
4           6 7     3   12   5  
    15 14 10   5 16     8   3 1 13  
  16 4   12       11       2      
2 13 7       4 1   14       5 10  
5             14 7 3         9 6
Showing puzzle number: 4107
Puzzletype: Symmetrical Sudoku
Startnumbers: 104
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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