Is there only one possible solution for each board? Today I felt like deriving contradictions was a lot harder today than usual, but I still ended up with the correct answers.
I think there should be a way to mark dominos as "confirmed" vs "guesses", because not everyone is going to have working memory to remember which tiles laid down are "guesses" for deriving contradictions.
Comments
Is there only one possible solution for each board? Today I felt like deriving contradictions was a lot harder today than usual, but I still ended up with the correct answers.
I think there should be a way to mark dominos as "confirmed" vs "guesses", because not everyone is going to have working memory to remember which tiles laid down are "guesses" for deriving contradictions.
Today, the last puzzle had at least two solutions. I'd prefer that the puzzles were always unambiguous.