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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.

747847 puzzles downloaded.

          1         10 13     5
  2 4 3 9   5       7     11  
      1     14     6       15 4
  1 2 5     10       4 7     3
  4           5 9 15     2    
3         2 4 8           13 14
  11   15 4   9   2   3 14   12  
    9 7 3     15     11 5 10    
  14   12 6   3   13   15 2   7  
15 6           9 3 11         10
    1     13 6 10           14  
9     13 2       15     8 7 5  
6 3       5     7     12      
  13     11       12   1 10 5 3  
8     9 1         2          
Showing puzzle number: 2857
Puzzletype: Symmetrical Sudoku
Startnumbers: 91
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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