Home › Expert Sudoku
Expert Sudoku
Expert puzzles, sometimes called "evil" Sudoku, withhold almost everything obvious and reward patient, methodical elimination. They're still 100% logic with exactly one solution.
Play Expert Sudoku free →Built for serious solvers
An expert board on Playoku is graded to require the hardest techniques in the game. Expect to lean on tidy candidate notes, X-Wings and chained eliminations. You'll earn every digit you place.
- Maximum-difficulty puzzles, each guaranteed solvable by logic alone.
- Notes mode is your workbench — keep every candidate current.
- Undo, redo and hints for when a chain finally snaps.
- Free, no sign-up, with auto-save for the long ones.
Bring the right tools
Brush up with the Sudoku tips & strategies guide before you dive in; the X-Wing and pair techniques there are exactly what expert boards demand. Need to step back? Hard and Easy are a click away.
Frequently asked questions
Is expert Sudoku the same as evil Sudoku?
Yes. Different sites name the top tier differently — on Playoku, Expert and Evil are the same difficulty: the hardest boards we generate that are still solvable by logic alone.
Can expert Sudoku be solved without guessing?
Always. Every Playoku board has exactly one solution and never needs a guess. Expert simply hides the deductions behind advanced patterns like X-Wings and chains.
What is the hardest technique expert Sudoku needs?
It varies by board, but expect X-Wings, XY-Wings and chained eliminations. Tidy pencil notes are essential to spot them.