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ok here is an example of a puzzle i just did...

i added the read letters and numbers to help explain the choice of sqaures for numbers...
of course starting out you wanna pick the sqaures with the most numbers already filled in.
i started out with the top right hand corner first on this one because i already saw a couple of numbers i could put in.
in this square you have these numbers missing: 8 , 5 , 1 , 3.
just looking at the board you can already see that 8 cannot be C7 (see D7), 3 cannot be B8 or C8 (see F8).
we still have this choice of two spots to choose from for each number. in order to get more information we need to broaden our look at the board.
look at the bottom left square...
so for this square you're missing 9 , 2 , 3 , 6.
2 has to go in G3 because all of the other squares are blocked (see B1, D2, H8).
6 cannot be H2 (see H9)
so we still have choices to make in these two squares...but the key is now that we know which numbers we have to choose from...between the top right and bottom left squares, we can make some big decisions about either Row C or Row G that will help you to place the numbers correctly.
atleast that's how i approached it i dunno...maybe there is a different way.
i dunno if anyone is even gonna bother reading this so i'll stop there unless you guys want me to keep going.
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