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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.

398543 puzzles downloaded.

7 11 13   2   4   6   10 16 1   5  
  13   16   15 8 3   6   1 4   14 2
10   1   16 7 12 9 5   13 15   14    
8   11           14     4 9     12
15   6 12   4   1   7 8 11     9 14
  16   4   6 5           12     3
            9   15 13 6 8 3 4 12 1
9 6 3   7 12 15     4 2       10  
  9       16 10     11 15 3   5 7 8
4 5 9 13 15 11 14 6   16            
1     5           12 9   15   13  
2 4     13 1 6   12   14   11 7   16
16     9 11     2           3   6
    7   12 13   4 10 2 1 6   9   5
11 14   1 8   13   16 15 12   6   4  
  15   6 4 9   7   8   10   13 1 11
Showing puzzle number: 1757
Puzzletype: Symmetrical Sudoku
Startnumbers: 140
Difficulty: Harder (0)
Solution methods: SiSo SC DC XW
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