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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.

500691 puzzles downloaded.

  8         9 10     12  
    12   9     7   4    
  6               1 9 11
10 9     11 3   2       8
          12         8  
12         1     8 6    
    11 7     10         2
  10         1          
7       4   8 5     3 1
3 12 5               11  
    6   2     4   12    
  3     12 4         2  
Showing puzzle number: 123
Puzzletype: Symmetrical Sudoku
Startnumbers: 48
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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