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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.

1110369 puzzles downloaded.

          9 11 3                
2   6   13 4               11    
              10 7       5      
4   1     7     6 9 14   16     10
  11   2   3 9   15       13      
13 9 16 12       11   6 3   14 10   4
1         8     9           5  
3 8   4   15 5   1 14         12 11
8 10         13 2   7 15   4   16 3
  4           1     13         14
11   9 15   5 4   16       10 2 13 12
      3       6   4 10   8   11  
12     9   10 3 5     1     13   16
      10       14 12              
    11               7 10   14   8
                14 5 16          
Showing puzzle number: 449
Puzzletype: Symmetrical Sudoku
Startnumbers: 96
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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