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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.

718323 puzzles downloaded.

      1   9           7
  10 6 5         7      
3                      
8   4   9 2     10 12    
1           10 12 5      
12             3 8     10
2     11 1             6
      4 2 3           12
    3 10     4 11   5   8
                      5
      7         2 1 9  
10           9   6      
Showing puzzle number: 459
Puzzletype: Symmetrical Sudoku
Startnumbers: 44
Difficulty: Very easy (0)
Solution methods: SiSo SC
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