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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.

3788557 puzzles downloaded.

6 15 2 13 14 7 3 5 12 8       10 4 9
  4 11   16         6   10       15
8   9 7 1 4         15 2        
  16   10       8 3   4     2    
9 11     6       13 12   8 7 16   5
10 2   4   3 9   16       12 14 8  
  8     10         1     13   9  
    13   8 1 16         14 11   10 2
13 14   11 12         2 8 1   9    
  5   3     8         9     12  
  6 7 8       11   3 12   10   14 13
12   10 1 7   13 16       6     15 8
    8     12   14 2       6   5  
        2 16         13 5 3 8   10
7       5   11         12   13 2  
11 10 5       7 6 1 4 9 3 15 12 16 14
Showing puzzle number: 420
Puzzletype: Symmetrical Sudoku
Startnumbers: 126
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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