Sudoku x 4

The goal of the game (aka Sudoku or Number Place) is to fill in the empty cells, using the numerals 1 through 9, placing one number in each cell so that each column, row, and 3x3 region contain the numbers 1-9 exactly once. Sharpen a pencil, print this page, and get started.

Game:  

    3   6     7 1
      1   3   8 9
5           3    
  3   2   9   5  
8               6
  5   6   1   4  
    5           7
3 6   9   7      
7 2     3   8    
Difficulty: starstar
Skill Level:

Game:  

  3     1     8  
  4   2   5   7  
    2       9    
9 8           6 4
      8 3 4      
3               2
  2   6   1   9  
  1     9     2  
        8        
Difficulty: starstar

Game:  

    4   2 7   9  
      1       7 5
7       5        
  9     1       2
8   6 4   2 9   7
4       6     8  
        4       6
2 4       6      
  6   9 7   5    
Difficulty: starstarhalf star

Game:  

G a m e
N o t
F o u n d
starstarstarstarstarstarstarstarstarstarstarstarstarstarstar
EasyMediumHardVery HardDiabolical