BTroisi - 2014-04-25 2:04 AM
I don't know what "coloring" means. Perhaps this is the short-cut that I'm missing? Please explain.
I solved it both ways and had initially thought both worked tho' now I see the mistake in my "other" solution.
Coloring is basically a way to set placeholders meaning that certain cells will contain the same digit X. R1C1 is 3/6, so are R5C1 and R5C2. So if digit X is in R1C1, it'll be in R5C2 by eliminating itself from R5C1. This same digit will now eliminate itself from R1C5
(because its in R1C1
) and R2C2
(because its in R5C2
) and will therefore be in R2C3. Coloring's just a simple way of getting to this because you can color
(or mark in some way like circling
) the cells I mentioned instead of going 3/6 in your mind for each one.