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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.

399005 puzzles downloaded.

2     1     8 12 10     4 14 16 3 9
  11     12   13 15 8     16 3      
  2 15   1 8   7   6 3     5 14  
15   5 7       1   9 2 13 10     11
  3     11     13       8 12 15 2  
16 7   5           3 13   2 1 6 15
1       7 14 10       6     8 12 13
10       9 13 4   3 14 15   5      
      4   12 15 8   5 9 2       1
6 16 10     3       12 4 11       8
12 13 1 10   9 7           8   11 3
  6 13 9 3       1     14     15  
11     3 15 4 1   12       16 2   10
  5 4     10 2   15   12 1   13 7  
      14 13     2 4 10   9     5  
13 8 9 12 6     14 11 2     15     5
Showing puzzle number: 889
Puzzletype: Symmetrical Sudoku
Startnumbers: 134
Difficulty: Very hard (0)
Solution methods: SiSo SC DC XW SF
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