A quiet puzzle space
Sudoku by Pablo Castillo is a minimal web Sudoku game built around calm concentration, repeatable daily practice and a clean interface that gets out of the way.
CalmSoft visual rhythm, no noisy gamification.
PracticeDaily puzzles, local streaks and progress.
ClaritySmart hints, notes and readable difficulty profiles.
What it includes
- Classic Sudoku in Easy, Medium, Hard and Expert.
- Daily Sudoku generated from the date and difficulty, plus Daily Archive.
- Notes, Strategy Coach hints, local progress, streaks and best times.
- Light, Dark, Paper and Focus themes with a refined visual identity.
- Installable PWA support with offline-ready assets.
Design principle
The game is intentionally lightweight: no account, no backend, no ranking pressure and no unnecessary interface noise. Progress is saved locally on your device.