I did two Sudoku puzzles a couple months ago from some National Inquirer sort of publication. Anyways, I found them pretty enjoyable but had basically forgot about their existence until yesterday, when someone mentioned
www.websudoku.com to me.
I've messed around several puzzles. I still find them pretty enjoyable, nothing too great, but I am interested in methodology used to solve them. It seems to me, easy ones can be solved in many different ways, using many different strategies. However, it also seems that some of the difficult puzzles have many fewer possible ways to be solved, possibly just one start-to-finish line of logic to find a solution.
It's hard for me to say for sure because there are some that I haven't yet been able to solve (though I haven't been spending much time with the really tough ones.) I arrive at a point where I have only 2 possible squares for a certain number, I mentally call this a couplet. I'm looking for a very precise strategy at this point, rather than simply "guessing" and continuing on intil I find a contradiction that would give certainty to the position in the original couplet. Anyways, maybe there is no strategy other than to "guess". I put guess in quotes because it's not really guessing. You are choosing one number, and continuing with a strategy to find a contradiction further in the puzzle, but I wonder if there are better ways to solve them.