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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.

9 7 15 14   3 5             4 13  
13   11 12         1 8 5 16 2     4
16 10 1         14 11 4 8 3   15    
      6     1   5     8 13 11   7
6 5     4 2 3       16   11 1   15
14 4 7           15 13   6       16
    8 10     2 13 6 7 9 12   16 5  
      2   10   11 8 6 3 1 16 14    
    3 4 6 1 9 8 14   11   5      
  9 10   13 5 16 7 4 15     3 12    
8       1   7 10           6 3 14
12   5 15   16       3 7 2     4 6
7   16 8 12     5   10     15      
    12   10 11 6 15 7         2 1 5
15     13 16 7 11 2         4 9   10
  3 14             2 15   9 5 7 12
Showing puzzle number: 1913
Puzzletype: Symmetrical Sudoku
Startnumbers: 136
Difficulty: Hard (0)
Solution methods: SiSo SC DC
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