Sudoku
Today's Sudoku puzzle at easy, medium, or hard difficulty, a new one every day.
Generating today's puzzle…
About this puzzle
Sudoku, generated fresh every day at three difficulty levels: easy, medium, and hard, so you can pick the challenge that fits. Easy leaves the most starting numbers filled in for a quicker solve; hard leaves the fewest, for a real daily challenge; medium sits in between. Every puzzle, at every difficulty, is generated with a real backtracking solver that verifies it has exactly one valid solution before it's shown to you.
Frequently asked questions
- What's the difference between easy, medium, and hard?
- Mainly how many starting numbers are filled in. Easy leaves the most, for a quicker solve; hard leaves the fewest, requiring more deduction and sometimes more advanced solving techniques; medium sits in between. Switch between them anytime with the tabs above the board; each keeps its own puzzle and progress.
- Does today's puzzle change if I come back later?
- No, the puzzle stays the same all day (based on your device's local date) so you can pick up where you left off. A new puzzle appears the next day, at every difficulty.
- Is every puzzle guaranteed to be solvable?
- Yes, at every difficulty. Each puzzle is generated with a solving algorithm that verifies it has exactly one valid solution before it's shown to you, the same standard used by published Sudoku puzzles.
- Can I get hints?
- Not currently. Conflicting entries are highlighted as you go, which helps catch mistakes, but there's no reveal-a-cell hint feature yet.
Other puzzles
🔒 All puzzles are generated and solved entirely in your browser. Nothing you enter is ever sent anywhere.