How to play Nano Sudoku
- Tap an empty cell, then pick a number 1–4.
- Each row, column, and 2×2 box may use each digit only once.
- Given cells (bold) stay locked — fill the rest to clear.
- Higher levels hide more digits. Clear all 5 stages for the run.
Good to know
- Free and instant: runs in your browser on phone, tablet or desktop — nothing to install.
- Session length: about 1–3 min per round, perfect for a short break.
- Progress saves automatically in this browser: best scores, missions and favorites.
Start playing Nano Sudoku or browse all Play Hub games.
