Copyright (c) James A. Storer

Moon and Star Problem 4

The bottom layer is to the left of the vertical row of $'s,
and the top layer is to the right.

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Rectilinear Solution
      Rectilinear steps: 25
      Straight-Line steps: 25
      Unit steps: 50
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#0:
S S 1 1 $        
S S 1 1 $        
A A 2 2 $ A A A  
A A 2 2 $ A A    
B B     $ B B    
B B     $ B B    
C C D D $ C C    
C C D D $ C C D  

#1. Move D north 2 units:
S S 1 1 $        
S S 1 1 $        
A A 2 2 $ A A A  
A A 2 2 $ A A    
B B D D $ B B    
B B D D $ B B D  
C C     $ C C    
C C     $ C C    

#2. Move C east 2 units:
S S 1 1 $        
S S 1 1 $        
A A 2 2 $ A A A  
A A 2 2 $ A A    
B B D D $ B B    
B B D D $ B B D  
    C C $     C C
    C C $     C C

#3. Move B south 2 units:
S S 1 1 $        
S S 1 1 $        
A A 2 2 $ A A A  
A A 2 2 $ A A    
    D D $        
    D D $     D  
B B C C $ B B C C
B B C C $ B B C C

#4. Move A south 2 units:
S S 1 1 $        
S S 1 1 $        
    2 2 $        
    2 2 $        
A A D D $ A A A  
A A D D $ A A D  
B B C C $ B B C C
B B C C $ B B C C

#5. Move S south 2 units:
    1 1 $        
    1 1 $        
S S 2 2 $        
S S 2 2 $        
A A D D $ A A A  
A A D D $ A A D  
B B C C $ B B C C
B B C C $ B B C C

#6. Move 1 west 2 units:
1 1     $        
1 1     $        
S S 2 2 $        
S S 2 2 $        
A A D D $ A A A  
A A D D $ A A D  
B B C C $ B B C C
B B C C $ B B C C

#7. Move 2 north 2 units:
1 1 2 2 $        
1 1 2 2 $        
S S     $        
S S     $        
A A D D $ A A A  
A A D D $ A A D  
B B C C $ B B C C
B B C C $ B B C C

#8. Move S east 2 units:
1 1 2 2 $        
1 1 2 2 $        
    S S $        
    S S $        
A A D D $ A A A  
A A D D $ A A D  
B B C C $ B B C C
B B C C $ B B C C

#9. Move A north 2 units:
1 1 2 2 $        
1 1 2 2 $        
A A S S $ A A A  
A A S S $ A A    
    D D $        
    D D $     D  
B B C C $ B B C C
B B C C $ B B C C

#10. Move D west 2 units:
1 1 2 2 $        
1 1 2 2 $        
A A S S $ A A A  
A A S S $ A A    
D D     $        
D D     $ D      
B B C C $ B B C C
B B C C $ B B C C

#11. Move S south 2 units:
1 1 2 2 $        
1 1 2 2 $        
A A     $ A A A  
A A     $ A A    
D D S S $        
D D S S $ D      
B B C C $ B B C C
B B C C $ B B C C

#12. Move 2 south 2 units:
1 1     $        
1 1     $        
A A 2 2 $ A A A  
A A 2 2 $ A A    
D D S S $        
D D S S $ D      
B B C C $ B B C C
B B C C $ B B C C

#13. Move 1 east 2 units:
    1 1 $        
    1 1 $        
A A 2 2 $ A A A  
A A 2 2 $ A A    
D D S S $        
D D S S $ D      
B B C C $ B B C C
B B C C $ B B C C

#14. Move A north 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
    2 2 $        
    2 2 $        
D D S S $        
D D S S $ D      
B B C C $ B B C C
B B C C $ B B C C

#15. Move D north 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
D D 2 2 $        
D D 2 2 $ D      
    S S $        
    S S $        
B B C C $ B B C C
B B C C $ B B C C

#16. Move B north 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
D D 2 2 $        
D D 2 2 $ D      
B B S S $ B B    
B B S S $ B B    
    C C $     C C
    C C $     C C

#17. Move C west 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
D D 2 2 $        
D D 2 2 $ D      
B B S S $ B B    
B B S S $ B B    
C C     $ C C    
C C     $ C C    

#18. Move S south 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
D D 2 2 $        
D D 2 2 $ D      
B B     $ B B    
B B     $ B B    
C C S S $ C C    
C C S S $ C C    

#19. Move 2 south 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
D D     $        
D D     $ D      
B B 2 2 $ B B    
B B 2 2 $ B B    
C C S S $ C C    
C C S S $ C C    

#20. Move D east 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
    D D $        
    D D $     D  
B B 2 2 $ B B    
B B 2 2 $ B B    
C C S S $ C C    
C C S S $ C C    

#21. Move B north 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
B B D D $ B B    
B B D D $ B B D  
    2 2 $        
    2 2 $        
C C S S $ C C    
C C S S $ C C    

#22. Move C north 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
B B D D $ B B    
B B D D $ B B D  
C C 2 2 $ C C    
C C 2 2 $ C C    
    S S $        
    S S $        

#23. Move S west 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
B B D D $ B B    
B B D D $ B B D  
C C 2 2 $ C C    
C C 2 2 $ C C    
S S     $        
S S     $        

#24. Move 2 south 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
B B D D $ B B    
B B D D $ B B D  
C C     $ C C    
C C     $ C C    
S S 2 2 $        
S S 2 2 $        

#25. Move D south 2 units:
A A 1 1 $ A A A  
A A 1 1 $ A A    
B B     $ B B    
B B     $ B B    
C C D D $ C C    
C C D D $ C C D  
S S 2 2 $        
S S 2 2 $