hi
maybe i'm missing something, but i tried to follow some of the explanations of "advanced technique" but it all sounds like making mountains out of molehills.
i don't do lots n lots of sudoku but haven't yet found one not solvable by basic logic and patience. true, i can't tell you mathematically WHY they work, and I can be slow, but I don't just guess and they always work out fine.
I have a book by Will Shortz and I do the Evil ones on websudoku.com.
so i guess my question is, do most of you guys go for speed and use the advanced techniques to go faster, or are there harder sudoku out there that I haven't found?
I'm not really interested in going fast, but if anyone knows of someplace to get harder ones, I'd like to know.
thanks!