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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.

404194 puzzles downloaded.

    13 4 16 3   2   9     5 8    
11 6   12   13 4   3 15           16
      2   11   4 7 12 1 5   6 15 8
14     13     3 5 15     1 8 12   7
3 16   7   12     5 11   4 14   1 15
9 14   5   2     1   4 16     11 3
6   5     16 14   8     2     13  
5       7     3 9 10   13     4  
  12     5   1 14 11     8       13
  4     14     6   1 15     13   12
15 7     10 8   11     2   9   14 5
4 9   14 11   16 1     3   13   7 2
13   1 11 4     8 14 7     16     9
12 5 7   1 6 9 16 4   13   11      
7           5 12   4 9   10   16 6
    4 15     2   16   10 7 1 11    
Showing puzzle number: 713
Puzzletype: Symmetrical Sudoku
Startnumbers: 136
Difficulty: Hard (0)
Solution methods: SiSo SC DC
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