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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.

8 7   2 3 15     13 9 6 4   16    
  6 5 16   13 10         15 1      
  11   10 8       4 5   12       14
10         9       15 5 1 14 11 16 2
14 12 2     16   5 11     6   8   9
  13 7 12 10 4 5       14   15     3
2 16   8       7 9 4       3    
  14 13   9     15   8 10 11 4 1    
    16 13 11 3 6   5     9   7 1  
    8       9 16 12       5   10 13
13     1   7       14 8 5 16 4 6  
11   4   1     8 10   9     12 13 7
9 5 1 3 16 14 4       2         8
6       14   8 13       7 12   4  
      6 7         10 11   3 2 9  
    10   5 12 11 6     16 14 13   2 1
Showing puzzle number: 2473
Puzzletype: Symmetrical Sudoku
Startnumbers: 134
Difficulty: Very hard (0)
Solution methods: SiSo SC DC XW SF
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