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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.

953354 puzzles downloaded.

        3 6   15         12    
  11       7         9       14
    8 14     11           15 13 7
    14 7 4   3       15   8 1  
    13     10 1 9     6   14    
  3   9 15       11     13   5  
  7     14 8 12     1     9   6
5       1 11       9 10       13
6   10     3     5 14 4     7  
  5   15     8       14 1   11  
    7   6     1 2 10     4    
  4 3   9       7   8 6 2    
10 13 12           3     9 6    
9       7         12       3  
    11         8   5 12        
Showing puzzle number: 283
Puzzletype: Symmetrical Sudoku
Startnumbers: 86
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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