The Most Difficult Rubik's Puzzle, Ranked

Ranking factors for difficult Rubik's Puzzle

1. Number of pieces
   The more pieces or elements a Rubik's puzzle has, the greater the number of potential combinations, making it more difficult to solve.
2. Complexity of the puzzle's structure
   A puzzle with a more intricate structure may have more complex algorithms and require more advanced solving techniques.
3. Number of colors or patterns
   A higher number of colors or patterns on a puzzle will make it more challenging, as the solver must take into account various relationships between colors or patterns while trying to solve it.
4. Type of movements (rotational, sliding, etc.)
   Different types of movements on a puzzle can increase its difficulty, as the solver must adapt their strategies to account for these unique manipulation requirements.
5. Parity issues
   Some puzzles have parity situations where an odd number of piece swaps are required. These situations can make a puzzle more difficult as the solver must recognize it and apply an appropriate solution.
6. Size
   Larger puzzles may have more layers, making them more challenging to solve. However, smaller puzzles can also be more difficult to manipulate, requiring greater precision and dexterity.
7. Degree of freedom
   Puzzles with more degrees of freedom allow for a wider range of possible moves, increasing the overall difficulty.
8. Uniqueness of the solution
   If a puzzle has only one unique solution, it may be considered more challenging, as the solver cannot rely on alternative combinations.
9. Learning curve
   Some puzzles may have a steeper learning curve, meaning that acquiring the necessary skills and techniques to solve them takes longer and requires more practice.
10. Available resources
    The availability of online tutorials, guides, and solvers can make a puzzle easier to solve. On the other hand, more obscure puzzles may have fewer resources available, making them more difficult.