Sudoku for Fun

Sudoku in its own tab: six difficulty levels, notes, hints, undo, pause, scoring, and full keyboard play.

Play Sudoku in a full browser tab, and learn the solving techniques behind harder puzzles. Features: Six difficulty levels, from Easy to Insane Notes (pencil marks) for tracking candidates Up to three hints per puzzle Unlimited undo Pause, with the clock stopping automatically when you switch tabs Scoring with a difficulty multiplier and a high-score list Full keyboard play: arrow keys, digits, and single-key shortcuts for every tool 12 interactive lessons that teach solving techniques with worked examples, "try it yourself" exercises and matching practice puzzles How to use: 1. Click the Sudoku for Fun icon in your toolbar, or press Alt+Shift+S. 2. Pick a difficulty and start playing. Your game is saved automatically, so you can close the tab and pick up later. 3. Open "Learn techniques" to work through the lessons.