Cyanoku - Relaxing Sudoku

Cyanoku is a Sudoku game with a daily puzzle, five difficulty levels, hints, and two visual themes. Every puzzle has one logical solution, so no guessing is required.

Daily puzzle
Each day, everyone receives the same puzzle. The difficulty increases over the course of the week, from Easy on Monday to Master on Sunday. A new puzzle is available each day, and your result is recorded on the daily leaderboard.

Five difficulty levels
Choose the level you want to play: Easy, Medium, Hard, Expert, or Master.

Hints
When you are stuck, a hint highlights the next logical cell and explains the reasoning behind it.

Ways to play
- Tap a cell and then a number, or tap a number first and then fill cells.
- Add pencil notes and candidates.
- Incorrect entries are shown in red.

Themes and comfort
- Two visual themes: a Night sky and an Earth forest, switchable at any time.
- Background music with selectable tracks.
- Changing backgrounds.
- A night light (blue-light filter) for use in low light.

Leaderboards and history
- A daily leaderboard and a weekly leaderboard.
- Gold, silver, and bronze medals.
- Completed games are saved with their time, difficulty, and score.

Other features
- Completion animations for finished rows, columns, and boxes.
- The number pad indicates which digits have been fully placed.
- Auto-resume returns you to your game where you left off.