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Define a new matrix M which is 9 by 9 by 9.
M represents, for each cell in A,
the remaining possible values for that cell.
Each cell in M shows the values which might fit
into the corresponding cell of A.
a ..8 | .7. | .1. POK Journal 060503 Three Dark Stars
b 1.6 | .3. | 7.. 10:07:40.610 060503
c .4. | 9.. | .2. Iteration counts 0 0 0
----+-----+---- <-- Blank cell count 51
d .8. | .23 | ..5 Nonblank cell count 163
e 3.. | ... | ..2 |
f 5.. | 19. | .6. |
----+-----+---- V
g .6. | ..9 | .3.
h ..5 | .8. | 2.9
i .3. | .1. | 4..
1 2 3 4 5 6 7 8 9
.---------.---------.---------..---------.---------.---------..---------.---------.---------.
a | 2 9| 2 5 9| || 2 456 | | 2 456 || 3 56 9| | 34 6 | a
b | | 2 5 9| || 2 45 8 | | 2 45 8 || | 45 89| 4 8 | b
c | 7 | | 3 7 || | 56 |1 56 8 || 3 56 8 | | 3 6 8 | c
|---------+---------+---------++---------+---------+---------++---------+---------+---------|
d | 4 67 9| |1 4 7 9|| 4 67 | | ||1 9| 4 7 9| | d
e | |1 7 9|1 4 7 9|| 45678 | 456 | 45678 ||1 89| 4 789| | e
f | | 2 7 | 2 4 7 || | | 4 78 || 3 8 | | 34 78 | f
|---------+---------+---------++---------+---------+---------++---------+---------+---------|
g | 2 4 78 | |12 4 7 || 2 45 7 | 45 | ||1 5 8 | |1 78 | g
h | 4 7 |1 7 | || 34 67 | | 4 67 || | 7 | | h
i | 2 789| | 2 7 9|| 2 567 | | 2 567 || | 5 78 | 678 | i
'---------'---------'---------''---------'---------'---------''---------'---------'---------'
1 2 3 4 5 6 7 8 9
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