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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.

10               9 1   11
8 2     10 3 1   12      
7           8          
4     7   9            
  6       5 7     4    
1   5 12     11          
          7     1 5   10
    1     6 2       9  
            12   4     8
          1           4
      9   8 5 2     7 3
9   4 5               1
Showing puzzle number: 898
Puzzletype: Symmetrical Sudoku
Startnumbers: 46
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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