Sudoku difficulty levels explained
Difficulty depends not only on the number of starting clues but also on the logical techniques and deduction chains needed to finish the puzzle.
Choose a Sudoku levelEasy and Medium
Easy puzzles usually offer more direct placements and are suited to learning. Medium puzzles require more repeated scanning and candidate management.
Hard and Expert
Hard puzzles contain fewer obvious moves. Expert puzzles usually require sustained candidate work and stronger elimination patterns.
Evil and Hell
Evil and Hell are intended for advanced solvers. Expect sparse openings, longer deductions and fewer immediate singles.