afull

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  A is completely filled in.  M is empty.

  Both represent the fact that no uncertainty is left.

a  258 | 674 | 913        POK Journal 060503  Three Dark Stars                               
b  196 | 832 | 754        10:07:40.610 060503                                                
c  743 | 951 | 628        Iteration counts       9  0  0                                     
   ----+-----+----    <-- Blank cell count       0                                           
d  689 | 723 | 145        Nonblank cell count    0                                           
e  371 | 465 | 892          |                                                                
f  524 | 198 | 367          |                                                                
   ----+-----+----          V                                                                
g  867 | 249 | 531  
h  415 | 386 | 279  
i  932 | 517 | 486
       1         2         3          4         5         6          7         8         9       
  .---------.---------.---------..---------.---------.---------..---------.---------.---------.  
a |         |         |         ||         |         |         ||         |         |         | a
b |         |         |         ||         |         |         ||         |         |         | b
c |         |         |         ||         |         |         ||         |         |         | c
  |---------+---------+---------++---------+---------+---------++---------+---------+---------|  
d |         |         |         ||         |         |         ||         |         |         | d
e |         |         |         ||         |         |         ||         |         |         | e
f |         |         |         ||         |         |         ||         |         |         | f
  |---------+---------+---------++---------+---------+---------++---------+---------+---------|  
g |         |         |         ||         |         |         ||         |         |         | g
h |         |         |         ||         |         |         ||         |         |         | h
i |         |         |         ||         |         |         ||         |         |         | i
  '---------'---------'---------''---------'---------'---------''---------'---------'---------'  
       1         2         3          4         5         6          7         8         9