In the grid to the left, place each of the letters
D, E, I, O, R, U, V and Y
exactly once in each row, column and 3×3 box.

 O E R    V         
   U    Y   I      R
          E    U    

In the grid below, place each of the letters
E, F, H, N, O, P, S and T
exactly once in each row, column and 3×3 box.

   R I  O      E   D
     Y           R  
        U      I    
     V      D  Y            F           
                              S E  O N  
     O  V U    D       H P  O   N       
   S        H  T    
          E    P O  
 F                  
            S    G                      
 S A           K       O    H P      T  
   K G      I  R A     E      F        N
 R        N         

In the grid to the left, place each of the letters
A, G, I, K, N, R, S and T
exactly once in each row, column and 3×3 box.

 G               R  
 K      G I    N    
   I    S   N  T    
            T  I    
 A                  

A Question of Intent

Solve the three overlapping code-doku puzzles. When you have completed the puzzle, the shaded squares will form a hidden message read left to right, then top to bottom. You will not be able to complete the puzzle using the sudoku rules alone. You will have to make choices that give a meaningful message.

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