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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.

382759 puzzles downloaded.

          1 3   2     15 5 16 7 13
  4     9 14   12 7   11   1 8   6
1 14 15 3             10 4     8 11
15     8 10 2 13 1 9   14 6 12 5    
    14 1   8     16 3   12 9 10    
  12 16   3   9 8         11 15 2 5
  2     4   1       16 10   7    
9   8 4 14     10 15   13     3   1
14   1     13   11 3     16 2 6   9
    9   11 10       7   8     5  
8 7 12 2         6 15   3   11 13  
    13 10 5   14 6     2   7 4    
    3 15 16 9   13 1 8 5 11 10     4
11 16     6 12             8 14 15 10
13   6 12   7   14 4   3 5     1  
4 10 11 16 12     2   1 8          
Showing puzzle number: 1209
Puzzletype: Symmetrical Sudoku
Startnumbers: 136
Difficulty: Harder (0)
Solution methods: SiSo SC DC XW
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