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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.

2 14 5 8   10 4           12   11 13
13 10 9 4 11 5   8   16   3        
  12 1       15 7 11         10    
6   11     12     9       16     8
12       5 14       9            
9             15 13   12   11   14 3
        1 3   12     6     5   15
4       7         3   16 1      
      13 15   10         6       5
10   6     13     8   1 5        
1 7   14   11   5 2             16
            8       10 9       2
3     9       16     5     12   10
    7         11 16 10       8 2  
        4   5   3   13 2 9 14 16 7
15 8   5           4 9   13 11 3 6
Showing puzzle number: 670
Puzzletype: Symmetrical Sudoku
Startnumbers: 104
Difficulty: Super easy (0)
Solution methods: SiSo
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