Expert Sudoku
Expert Sudoku features hard sudoku puzzles for experienced solvers.
Expert Sudoku
00:00
Keyboard: 1–9 enter · arrows move · N notes · Backspace clear · Ctrl+Z undo
How to Play Expert Sudoku
- Expert describes a difficulty level, not a separate grid shape.
- Follow the rules of the individual puzzle, including any overlapping regions or diagonals.
- Use logical deductions to fill every active cell without repeating digits in a required group.
Tips for Solving
- Keep complete notes and update them after every deduction.
- Look for pairs of cells limited to the same two candidates.
- Work methodically across all groups rather than guessing when progress slows.
Frequently Asked Questions
Is Expert Sudoku free to play?
Yes. Every Expert Sudoku puzzle on Sudoku Shrine is free in your browser, with no account or download.
Does every Expert Sudoku puzzle have one solution?
Yes. Each puzzle is checked by a solver so it has exactly one solution and can be solved by logic alone.
Which difficulty should I start with?
Start with Easy to learn the layout, then move to Medium and Hard once scanning and notes feel natural.
Is my progress saved?
Yes. Your entries and notes are saved in this browser, so you can close the page and continue later.