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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.

            7 3 14   13 10 15     1
    1 8     6 15 5   11 4   7   3
12 3 9 7         2             8
      6 8 10   12 7 2 5   11 1 4 9
1 10 4       14       7     11 13 2
  5   2     9 11 12 1 8   7   6  
2 8   16   3       13 6   5 14 9 15
11   7 12   4 15     10 14 8     2  
  13     3 2 4     7 12   8 6   16
16 9 3 11   7 8       1   2   15 6
  15   4   9 13 8 10 6     14   12  
9 2 13     12       8       4 3 11
7 1 8 3   15 12 2 6   16 11 4      
14             1         6 3 5 10
4   6   5 1   13 11 16     9 2    
8     9 1 6   4 15 11            
Showing puzzle number: 1631
Puzzletype: Symmetrical Sudoku
Startnumbers: 138
Difficulty: Harder (0)
Solution methods: SiSo SC DC XW
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