About Stealthdoku
Stealthdoku is a lightweight browser-based Sudoku game for office professionals, students, paper-puzzle solvers, and anyone who wants a focused logic break without creating an account.
Design Principles
- Zero Friction: Start immediately with no registration, login, or subscription.
- Quick Hide: On desktop, Space opens a standalone digital clock and pauses the game. Press Shift twice to return.
- Accessible Printing: The A4 two-sided format places Normal on the front and Easy on the back for community programs, senior activities, classrooms, and paper solving.
- Verified Puzzles: Every puzzle offered is checked for a unique solution and logical solvability.
Lightweight by Design
Your active board, elapsed time, difficulty, hints, and view preference remain in browser storage on your device. This keeps gameplay fast and lets you continue where you stopped without an account.