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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.

841507 puzzles downloaded.

                        8 12  
          14     7     6   2 3
    15 14 12 9     6   5   4   11
4 8   11   1 9 3     13 15      
1 5       11   14 10   4 2 9    
13         4       8 12 5     1
  6 4 15       12 13 3       7  
5   10   8           6   3   2
  12       6 1 2       8 15 13  
11     8 5 10       7         15
    1 3 2   11 13   4       5 14
      10 4     9 8 14   3   1 13
14   9   6   4     15 1 13 2    
12 15   2     7     10          
  4 11                        
Showing puzzle number: 12162
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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