Sudoku Challenge
                
                
                
                
                
                    
                
                
                
                
                    
                    
                    
                    
                    
                    
                    
                    
                    
                
                
                
                
                    
                    
                    
                
                
                
                
                    How to Play
                    
                        - Click on a cell to select it
 
                        - Click a number or press a number key (1-9) to fill the cell
 
                        - Use Delete/Backspace key or Clear button to remove a number
 
                        - Arrow keys can be used to navigate between cells
 
                        - Fill the entire grid with numbers 1-9 without repeating in any row, column, or 3x3 box