I just did an easy puzzle that was harder than a diablo one. What happened?
Being that the puzzles are computer generated, it’s very difficult for the computer to determine exactly how difficult a puzzle is. Currently, the computer calculates the number of possible entries in each cell and uses that as it’s basis. In addition to that, harder puzzles tend to require more guesses. Of course, there’s always that one or two easy puzzles that seems really difficult still.