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.

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

Puzzle #47

Difficulty: Hard

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