How to play
                
            - Your goal is to have exactly one in each row, column, and color region. 
- Tap once to place X and tap twice for . Use X to mark where cannot be placed. 
- Two cannot touch each other, not even diagonally. 
                Examples
                
                    
                         
                        
                    
                         
                        
                    
                         
                        
                    
                         
                        
                
            
            
            Each row can only have one .
Each column can also only have one .
Each color region can also only have one .
Two  cannot touch each other, not even diagonally.
Could not load the screenshot
                    This could be due to a number of reasons, including,
                    but not limited to, low image resolutions, uneven lighting conditions,
                    or other objects being too close to the board.
                
                General tips and notes for better results
- Try cropping the image closer to the edge of the board.
- If your board has an alternate colour scheme, this feature might struggle to recognise all the different colours.