R N              
   A    I      W    
 H        N R  C    
     E  W           
            A    C  
   W        T      A
 C             E H  
     R         I    
            N       

Code-Doku Joke

How do you prevent a summer cold?

Place each of the letters of A RICH NEWT exactly once in each row, column and 3×3 box. When you have completed the puzzle, the shaded squares will form the punch line of the joke read left to right, then top to bottom.

Difficulty: Challenging

Here is a print-friendly version of this puzzle.

 

Please send responses to my email address is mathrec at this domain

Thanks,
Steve