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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.

402311 puzzles downloaded.

  15   7 8 14     3 16       2    
  5   3     7   15 13   14 4 10 9  
16   6 10 4     3     5 11       9
5 11 7       1   4 10       6 16 8
7 3       11       8 9 12     4 6
9 12     13   8     4 6   1 3   5
    15   12 8 14   11     5   13 6  
10         5 4 1 8   11   16 9 2 15
13 4 12 6   16   8 7 9 15         3
  2 10   9     6   11 14 13   1    
3   8 5   10 12     2   7     14 11
15 16     10 4 9       8       11 14
11 9 16       5 10   12       8 3 2
4       14 9     6     8 12 5   16
  6 4 13 7   2 11   5     10   8  
    14       6 13     2 9 15   7  
Showing puzzle number: 2454
Puzzletype: Symmetrical Sudoku
Startnumbers: 136
Difficulty: Very hard (0)
Solution methods: SiSo SC DC XW SF
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