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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.

403268 puzzles downloaded.

    9   2 13 11 4     16         3
  15 10 8     9       13     5   11
2 7     14 8 16     12 10   1     6
11     9   10 13   15 4       7 3 1
    11 10     12 6 9   15         4
13   3 2 5   1 11       8 15 12    
5 10 2 16   15     11 1 4   9   12  
  1     9 14 15   5 8   3 6   10  
  12   4 6   3 16   2 11 10     14  
  5   11   6 10 7     14   8 1 13 16
    7 15 12       16 11   6 4 9   13
10         3   12 4 6     5 13    
4 9 1       5 14   10 6   16     2
1     6   5 4     16 9 14     11 12
7   15     16       13     2 6 1  
12         4     14 3 5 2   16    
Showing puzzle number: 429
Puzzletype: Symmetrical Sudoku
Startnumbers: 134
Difficulty: Harder (0)
Solution methods: SiSo SC DC XW
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