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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.

2192336 puzzles downloaded.

            1 9 12      
  6   11 5       3   7  
  4       12 8       1 11
5 11           12 7      
  2 1         8       5
8   6   7 5     4      
      8     12 4   11   10
10       3         12 4  
      4 1           6 7
9 1       11 4       8  
  3   12       7 9   5  
      10 12 3            
Showing puzzle number: 1821
Puzzletype: Symmetrical Sudoku
Startnumbers: 52
Difficulty: Very easy (0)
Solution methods: SiSo SC
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