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Sudoku puzzles 4x4 (Su Doku)

My database includes 34183 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 4x4 box contains the digits 1 through 16. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

3578030 puzzles downloaded.

            10 15 4 1 16   11 13 12  
    16     7 14 12           10 5 9
  8 12     6                   14
13 5           16         15   6 7
11   6     2   4       8 14     5
15   5         6           1    
      10   9   8 13   7 15        
        10   15 1 11 4           16
8           11 9 7 16   4        
        8 14   10 15   12   5      
    10           14         4   1
1     7 4       10   9     14   15
6 14   15         2           11 3
5                   8     16 1  
12 9 2           16 10 4     5    
  1 13 4   3 5 2 12 15            
Showing puzzle number: 18332
Puzzletype: Symmetrical Sudoku
Startnumbers: 96
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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