by Karyobin » Tue Sep 13, 2005 5:39 pm
akbristow: a 'naked triple' is three cells in a row, column or box that between them contain only three possible candidates. This means that those specific three candidates must be in those three cells, which means you can remove those possible candidates from other cells in that row, column or cell.
E.g.
{1} {2,4} {3} {4,5,6,9} {4,7} {2,4,7} {8} {6,9} {5,6,7,9}
In the above example (where the bold entries are known) cells 2, 5 and 6 contain only the candidates 2, 4 and 7 (a naked triple). This indicates that you can remove all possible 2's, 4's and 7's from every other cell in that row, which leaves:
{1} {2,4} {3} {5,6,9} {4,7} {2,4,7} {8} {6,9} {5,6,9}
which, as you can see, now leaves two naked triples in that row. Geddit?
brianbbrian: some would say your offering isn't particularly helpful.
As anyone with access to a computer can download any number of solver programs and find the answer themselves at the *click* of a mouse, you'll probably find (when you've read a few more posts) that most people here value method over solution.