How to play sudoku

Fill in the entire grid so that each digit in the range 1-9 appears exactly once in each row, column, and box.

How to fill the grid

It's easy! Simply click on a square. It should be highlighted gray. Now, hit the corresponding number key on your keyboard.

To remove a mistake, select the square by clicking on it and hit delete.

  5   8 4 2     1
    4       9    
8       5     4  
6     4       1 9
    7 5   6 8    
4 3       9     2
  8     9       6
    1       4    
5     6 8 1   9  

Puzzle #55

Difficulty: Medium

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