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.

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

Puzzle #48

Difficulty: Hard

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