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Sudoku puzzles (Su Doku)

My database includes 12449 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 3x5 box contains the digits 1 through 15. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

865132 puzzles downloaded.

15     9       7       6 3   12
6     2 3   11         1 5    
  11 12           8 2 10 7      
      6         15 12 14   8    
    2   15 11 5       3 12   6 10
1             3 13 10 7   15   2
11         5   10   13 8     12  
    6 7 13     2     5 9 10    
  8     10 3   14   11         13
3   13   7 15 12 5             9
4 2   12 6       9 14 1   7    
    5   9 2 6         4      
      13 12 4 1           11 5  
    11 3         5   9 2     4
2   7 1       9       8     3
Showing puzzle number: 3413
Puzzletype: Symmetrical Sudoku
Startnumbers: 95
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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