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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.

1153565 puzzles downloaded.

        14 5     10 1 6   15   13  
1         12       3 5   7     10
6   15     3         16     9    
    16   10 1       2           4
    2             9       11 3  
  11         3   16   2 12 10     9
8     6 12 13   1     10   5      
3         9   16   7   4 6 12    
    14 11 5   1   3   4         7
      1   7     13   11 15 16     8
4     8 3 11   6   16         5  
  10 9       8             13    
2           5       12 16   15    
    6     8         3     5   11
9     3   15 11       1         6
  5   13   4 7 2     15 6        
Showing puzzle number: 1684
Puzzletype: Symmetrical Sudoku
Startnumbers: 96
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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