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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.

461433 puzzles downloaded.

3   10           12      
12         1       2   9
7     11   2 4         10
  2   5 12           6 3
  4       11            
          9   7 3 4    
    4 3 5   2          
            9       7  
10 12           3 6   1  
1         3 8   7     2
8   9       12         6
      10           11   8
Showing puzzle number: 637
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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