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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.

454884 puzzles downloaded.

      8 4 12       11 3 7
  5     1       12 2 8  
  10 4       6          
12 2           8     1 3
11           5   6      
      12         9 7 2 5
6 12 11 3         10      
      9   1           10
10 11     2           12 9
          6       8 5  
  8 10 11       2     6  
9 6 1       8 10 11      
Showing puzzle number: 648
Puzzletype: Symmetrical Sudoku
Startnumbers: 54
Difficulty: Super easy (0)
Solution methods: SiSo
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