by **Animator** » Mon May 09, 2005 1:19 pm

Hmm, then I'll explain it some more:

possibilities for row8:

r8c2: 3, 7, 8, 9

r8c4: 3, 7, 8, 9

r8c6: 2, 8, 9

r8c7: 2, 8

r8c8: 2, 3

Now take a look at box 2: the only place where it can have a 9 is in column 6. this means we can remove 9 as candidate from r8c6, leaving 2, 8

Which means you can remove 2 and 8 from all other cells (except for r8c6 and r8c7 ofcourse).

Or look where 7 and 9 can occur: only in r8c2 and r8c4, this leaves only one valid place for the 3...