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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.

797918 puzzles downloaded.

4       2 1 11     10    
  1   7 4     3 2      
3       7     9 8      
    11       5 12 4 7   8
      3         9   5 2
    7               6  
  9               1    
7 11   10         12      
12   8 2 1 4       6    
      1 8     10       6
      6 12     5 11   8  
    4     11 7 6       9
Showing puzzle number: 4245
Puzzletype: Symmetrical Sudoku
Startnumbers: 52
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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