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Sudoku puzzles (Su Doku)

My database includes 2967 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row and every column contains the digits 1 through 16. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

285731 puzzles downloaded.

    6 14   5 1 12 4 13   15 11 2    
13   5       9   10 6   14     4 7
  5       10 7 11     15     13 8  
15   3 12 11       9 14 5     8 7 1
5 14 1     3 15       6     9 16  
12     1 9 6   10             3  
9   8   6 13 12   5     16 15   10  
4 15     1 8   3 12 10     5 14 11 16
14 6 11 10     4 15 8   3 13     5 12
  16   8 15     14   3 12 9   10   5
  12             15   7 4 3     13
  8 4     9       15 10     7 13 6
16 9 15     2 3 6       8 13 1   11
  7 12     4     3 5 1       2  
6 4     2   14 1   7       5   8
    9 4 5   10 13 14 8 2   16 12    
Showing puzzle number: 2212
Puzzletype: Symmetrical Sudoku
Startnumbers: 138
Difficulty: Hard (0)
Solution methods: SiSo SC DC
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