It's actually not really hard when one uses a formula you devise yourself. I like getting at least one line that has no successes in it, so I can eliminate all those letters. it would probably be even better if you got TWO lines of no success, but I didn't try for that.


Then when you get, say, one green block and two yellow blocks, concentrate on the correctly placed letter while keeping the also-rans in mind. It works.

I used yesterday's puzzle and after that I did half a dozen 'random' puzzles. I never had to go past the fourth line in any of them.