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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.

955063 puzzles downloaded.

  7   10     8           5    
1 9   5   4   6 7   10   3    
11 2       9   12     14   6    
          15 13   14           4
12   10   13         6   2 1   15
  1 15   9         4 11     8  
3 14       2   13   7 9       10
13 11   15               14   12 2
2       10 1   14   11       5 7
  5     12 13         7   9 14  
15   3 4   7         12   11   5
7           10   12 5          
    13   5     7   3       2 9
    2   6   14 4   10   13   1 11
    7           8     4   10  
Showing puzzle number: 1647
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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