Play
Sudoku
Every puzzle is generated in the browser with exactly one solution, proved by an independent solver before you ever see it. Difficulty is the hardest technique needed to finish — clue count is a poor proxy for how hard a grid actually plays.
00:00
Arrows move · 1–9 place · N notes · U undo · R redo · X mistakes · P pause · ? hint
Digits
- Clues
- 0
- Requires
- Naked single