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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.

557974 puzzles downloaded.

7   6     12 2 1        
  3       1     2 4 7  
9     7                
          10     6     5
          11 1   7     10
  5         8          
          8         4  
5     8   3 12          
1     10     3          
                10     4
  6 9 1     5       8  
        12 9 6     3   11
Showing puzzle number: 615
Puzzletype: Symmetrical Sudoku
Startnumbers: 42
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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