Javascript is required to play this puzzle. Please enable Javascript in your browser
  to continue.
        
    
      
      
      
      
      
      
  
    So far, so good!
  
  
      
  
    That's right!
  
  
      
  
    
    
      - 
        
      
- 
        
      
 
 
      
      
  
    Unlucky, it's not quite right yet...
  
  
      
  
    Onboarding
    
    
      
    
    
      
        
          
            Fill the grid using only the digits 1 to 9.
          
          
            
          
         
        
          
            Each block must add up to the total that appears 
            above it or to its left.
          
          
            
          
         
        
          
            You must not use the same digit more than once in a block.
          
          
            
          
         
        
          
            The same digit may occur more than once in a row or 
            column, but must be in a separate block.