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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.

699217 puzzles downloaded.

    7       1         10
  8           3        
  1 6   12     10     11 9
  9     5   4 1 6 7    
    9 3 1             4
              11       5
5       9              
2             9 11 3    
    10 6 7 1   5     12  
12 11     2     8   10 1  
        11           7  
7         11       9    
Showing puzzle number: 591
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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