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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.

398541 puzzles downloaded.

9 15 3 12   11 14 5     10   4 7   2
7           16     4 11     6    
15 7   13       6 12       1 9   11
    7 5     15 10 9 12   13 11 14 2 8
5 9   16 13       3           14 4
        2 10   12 11 7 15 5     8  
    16   9         6 14 10   5   7
13 5 12 6 7     3   1   4   15   9
16   4   1   2   6     15 14 8 5 12
10   14   4 8 1         7   13    
  3     12 15 8 13 10   1 6        
3 8           14       1 16   12 15
2 4 5 1 10   6 9 15 8     7 11    
1   10 8       15 4       13   3 16
    9     13 11     16           5
12   6 9   7     1 11 5   8 4 16 13
Showing puzzle number: 219
Puzzletype: Symmetrical Sudoku
Startnumbers: 134
Difficulty: Hard (0)
Solution methods: SiSo SC DC
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