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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.

  12                   4
      2   8         9 7
10   6       1   5   3 2
    7   6 11   2     1  
8     3     4 1 2      
    2     12       5   11
11   3       12     9    
      9 4 2     12     1
  2     7   3 9   8    
2 1   4   9       6   8
9 11         8   4      
5                   7  
Showing puzzle number: 1017
Puzzletype: Symmetrical Sudoku
Startnumbers: 52
Difficulty: Very easy (0)
Solution methods: SiSo SC
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