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Sudoku puzzles diagonals (Su Doku)

My database includes 5816 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 4x4 box contains the digits 1 through 16. The diagonals must also contain 1 through 16. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

829282 puzzles downloaded.

6         9 4           13      
4   12   3 16     13 8   5 2      
7 13           5     9       15  
        15   13   1     4   16   5
      12 4 1 11   16           6  
                  14   1       15
    7   8   5 16     4         11
15   13       7 3 6       8   9  
  3   7       1 11 12       5   13
9         3     8 7   6   12    
12       16   9                  
  14           8   16 3 15 10      
5   6   12     7   15   9        
  7       4     14           5 8
      9 5   15 13     8 2   6   14
      4           5 13         2
Showing puzzle number: 4101
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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