# Questions tagged [difficulty-rating]

A question about assessing or adjusting the difficulty level of a puzzle.

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### How long should an anagram be in order to be solvable by a human?

I'm writing some puzzles for a bunch of smart friends, but I'm unsure if the puzzle is too easy or too hard. For instance, an anagram like this: fangos theorem Should be solvable by a human without ...
308 views

### Generating different difficulties in custom puzzle

first of all this is my first time asking something here so please let me know if I am doing something wrong or asking it on the wrong place. I have a custom puzzle model where I need to generate ...
21k views

### What are the criteria for determining the difficulty of Sudoku puzzle?

What are the criteria for determining the difficulty of Sudoku puzzles? Is it a subjective estimation based on the author's experience, or are there any precise guidelines? For example, there are ...
720 views

### Hardest slitherlink you know [closed]

What is the hardest slitherlink board you have seen/solved/tried to solve? I've tried googling for some hard ones but came up with simple ones or sites describing what slitherlink even is... So in ...
1k views

### Are there any popular puzzles with polynomial-time algorithms?

First, a little background: as I noted in my answer to another question here, most of the puzzles that seem to stay popular for extended periods of time are canonically 'hard' in an algorithmic sense: ...
861 views

### In the Undead Game, what makes one board more difficult than another?

In the Undead Game, what makes one board more difficult than another? The game is defined like this: A 4x4 (or 5x5, etc) grid has some random squares filled with diagonal lines representing mirrors. ...
484 views

### Estimate beginner, mediocre, advanced & expert on puzzle games

I've created the Hannoi Towers, Lights out and not sure about the original name of this game. Now, when I want to create badges (beginner, expert etc.) for the puzzlers I stumbled upon a problem, I ...
2k views

### Is there a rating system for crossword puzzles?

On searching the internet for difficult crossword puzzles I find that the New York Times is often mentioned. But is there a rating system? If so how does it work?
854 views

### Puzzle design: How to incorporate confirmation of an answer?

Sometimes when I'm designing a puzzle which has more than one stage, I'd like to incorporate a 'check' for some of the answers (e.g. the answers of the earlier stages). Example: This puzzle needed 2 ...
2k views

### What should you look for when rating the difficulty of a puzzle?

After you're finished making a puzzle, what types of details should you look for when rating it's difficulty? What makes a puzzle easier or harder? Keep in mind a puzzle includes both the question and ...
330 views

### What factors affect the difficulty of Hamiltonian puzzles?

There is a type of puzzle which can be modelled as finding a Hamiltonian path through a graph. One example is the Icosian game. What factors affect the difficulty of such puzzles, to be solved by ...
755 views

### The strength of ciphers against brute force methods - what makes it more difficult but keeps it fair for humans?

EDIT: We have a couple of cipher puzzles on this site which use primitive, simple ciphers like Caesar, Bacon and substitution ciphers, and some of these puzzles combine them. This made me wonder ...