by iRob » Fri Oct 21, 2005 6:37 pm
I understand their language, but not their justification. For instance, I see that the 4 in c1r1 eliminates all of column 1 for a 4 in boxes 4 and 7.
But why is column 3 of box 7 not a possible candidate for the 4? Where's the restriction there?
...oh wait, I think I just answered my own question. It's circumstantial, isn't it? Only because there's only one available column for the 4s in box 7, and one remaining in box 4 that forces the 4 into c3r5.
Got it, thanks.