>And the top difficulty (Challenge) always requires guessing/backtracking. That's sorta where I am with sudoku, up to a certain difficulty they are fun and cha

>And the top difficulty (Challenge) always requires guessing/backtracking. That's sorta where I am with sudoku, up to a certain difficulty they are fun and challenging, after that it's just brute forcing and crossing off numbers and not fun. I think some of the better deduction techniques can come into play on the harder ones, but I haven't taught myself any of them.