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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.

755859 puzzles downloaded.

      1     11   8   3  
6 1         3 4   10    
  11 5   6   12     9 4  
    4         8       1
  12   4           3   7
    2         12       11
5       10         4    
4   11           1   10  
11       3         1    
  8 9     2   6   5 7  
    3   11 8         1 6
  5   7   3     12      
Showing puzzle number: 515
Puzzletype: Symmetrical Sudoku
Startnumbers: 50
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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