Sudoku Difficulty Explained: What Each Level Means

Easy, Medium, Hard, Expert and Master describe a progression within a puzzle collection. They are not universal measurements: different publishers can rate the same puzzle differently.

Why clue count is not a complete rating

The position of the clues and the deductions they allow matter alongside their number. More empty cells do not automatically make one puzzle harder than another. A level label also cannot promise a fixed solving time.

Choose a level by your experience

• Easy: a useful place to practise scanning rows, columns and boxes, and to check each placement.
• Medium: practise keeping candidates current and looking beyond the first single.
• Hard: give yourself room to compare candidate restrictions and revisit earlier deductions.
• Expert: consider studying more advanced patterns when your current toolkit stalls.
• Master: choose this when you enjoy sustained analysis and are comfortable seeking help with unfamiliar deductions.

These are practice suggestions, not a guarantee that every puzzle at a level requires a particular technique. Our interactive difficulty guide compares the five levels with worked strategy examples.

When to move up

Try the next level when you can explain your moves and want more variety. Move down when you want a shorter or more relaxed session. Familiarity, interruptions, notes and mistakes all affect time, so use your own experience rather than a universal minutes-per-level target.

Practise with a matching puzzle

Choose a level in daily browser Sudoku, or download a Medium weekly pack and adjust the selector. If a puzzle becomes frustrating, follow the stuck guide before changing random entries.