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Sudoku puzzles irregular (Su Doku)

My database includes 1031 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every box contains the digits 1 through 12. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

515025 puzzles downloaded.

7 12         9         3
      12   3   2 7   5 8
      8 7 2     1 6    
            3   4      
            7 11 10     12
6               11      
      11               5
12     2 10 7            
      3   12            
    2 6     1 4 3      
8 9   5 2   12   6      
3         9         8 6
Showing puzzle number: 944
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Harder (0)
Solution methods: SiSo SC SB DC XW
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