For those of you who use puzzles. How do you decide how complicated or difficult they should be. I have an idea that I love, but I know it will be difficult for my current players. To edit, The puzzle is you come into a room with 5 rows of 5 flags hanging from the ceiling. The flags are all of different colors. Some one color, Black, white, all the colors of the rainbow, and some are patterned. Choosing the right flag leads to success in your objective. Pulling the wrong flag creates a consequence. Pit suddenly opening, a creature appearing or the like. The only clue is... "Who is Robert?" Which flag do you choose?