Difficulty is not the same as fun. A puzzle can be hard and hollow, or easy and delightful. What separates them is whether solving it felt like something you did, or something that happened to you.
The question worth asking about a puzzle is not how hard it is. It is whether the person who solved it can explain why they were right. If they can, they did something. If they cannot, they guessed, and no amount of difficulty makes a guess feel good.
The seven shapes
- Match two things. A symbol here, the same symbol there.
- Read it a different way. Upside down, in a mirror, under a color.
- Count something. The answer was in the room the whole time.
- Put things in order. Dates, sizes, a sequence from a story.
- Find the odd one out. Six of one kind and one that is not.
- Follow a route. A map, a path, a set of directions.
- Combine two clues you already have. The best one, and the last to use, because it pays off everything before it.
Match two things
A symbol here, the same symbol there. The easiest shape there is, and the one to open with, because it teaches a group that the room rewards looking. Three matches in a row and they are hunting properly.
Read it a different way
Upside down, mirrored, under a colored filter, or at a distance. What makes this one work is that the answer is fully visible the whole time, so the moment it lands it feels like the room was fair, which it was.
Count something
The answer was in the room before they arrived. Use it once per adventure: it is the most satisfying shape and the most annoying to repeat, because the second time it is arithmetic.
Put things in order
Dates, heights, a sequence from a story they know. Good for a group, because ordering five things is a conversation and conversations are where the noise comes from.
Find the odd one out
Six of one kind and one that is not. Almost impossible to make unfair, which makes it the shape to hand to the youngest person in the room.
Follow a route
A map, a path, a set of directions. The only shape that moves people around, so it is what you use when a room has gone quiet and everyone is standing in the same corner.
Combine two clues you already have
Two things found ten minutes apart that mean something together. Keep it for last. It pays off everything before it, and it is the only one that gets a reaction out loud.
The three dials
When a puzzle is not landing, it is almost never the idea. It is one of three settings, and they are worth changing one at a time.
- How many things are in play. Four options instead of eight keeps the idea and halves the work. This is the dial to turn first, always.
- How far apart the pieces are. The same puzzle is twice as hard if the two halves are in different rooms, and not twice as good.
- Whether they find out they were right. Confirmation is the difficulty dial nobody thinks of, and the one that changes the feeling most.
Calibrating without a test group
You will not get six children to rehearse. What you can do is hand one puzzle to one person who has not seen it and say nothing at all. Thirty seconds of silence tells you more than reading it over yourself ten times, because you cannot un-know the answer.
Watch for the first thing they pick up. If it is not the thing the puzzle is about, the puzzle is pointing at the wrong object, and that is a placement problem rather than a difficulty one.
The one rule under all of it
There is always a route to the answer, and the difficulty lives in the thinking rather than in whether the thing can be found at all. A puzzle that needs information nobody in the room has is not a hard puzzle. It is a stopped adventure, and every group I have watched stop has stopped on one of those.
