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Sudoku puzzles (Su Doku)

My database includes 10934 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 3x4 box contains the digits 1 through 12. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

2311276 puzzles downloaded.

    9 10   5   3        
  6 8           1     10
        6 1            
9 10     5     12 11     1
            1         3
    1 3   9 7   8   4  
  1   6   4 5   3 7    
5         12            
10     11 8     1     5 4
            3 9        
6     8           11 12  
        10   4   6 5    
Showing puzzle number: 3591
Puzzletype: Symmetrical Sudoku
Startnumbers: 48
Difficulty: Harder (0)
Solution methods: SiSo SC SB DC XW
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