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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.

712060 puzzles downloaded.

    1       5   11 12   6
9                      
3     7       1   2 11  
7     1       6     9  
11         5            
      8   6 12   10      
      4   10 8   5      
            6         12
  11     5       7     4
  5 12   9       2     1
                      7
2   7 9   4       8    
Showing puzzle number: 417
Puzzletype: Symmetrical Sudoku
Startnumbers: 42
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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