ABC and ABCD grid fill-in puzzles


The following puzzle appeared in the Singapore Airlines in-flight magazine.
  B   
 
     
     
     
     
     
 
CA
 A
  
B 
 C      

Enter in each row and column the letters A, B and C in such a way that no row or column contains the same letter twice. Therefore two squares in each row or column remain empty. The letters outside the grid indicate what letter is to be entered first in the direction of the arrow.


Here's another such puzzle which I constructed. Instead of a 5x5 ABC puzzle, this one is a 6x6 ABCD puzzle.

This puzzle is Copyright © 2007 by James Dow Allen
    B   
 
      
      
      
      
      
      
 
 A
D 
DC
 A
  
 D C    

 
 

This puzzle is Copyright © 2007 by James Dow Allen


Here is a step-by-step solution for this second puzzle.
    B   
 
4    7
      
156   
265   
      
38    
 
 A
D 
DC
 A
  
 D C    

    B   
 
A    D
   910 
  1112  
  121113 
   109 
DA    
 
 A
D 
DC
 A
  
 D C    
    B   
 
A    D
      
   15  
    BC
      
DA   14
 
 A
D 
DC
 A
  
 D C    
    B   
 
A    D
      
 DAB  
  DABC
  1716  
DA   B
 
 A
D 
DC
 A
  
 D C    
Summary:
    B   
 
ACB  D
CB  DA
 DABC 
  DABC
B CDA 
DA C B
 
 A
D 
DC
 A
  
 D C