HOW TO SWEEP
Tap a tile to open it. Numbers say how many nukes sit in the eight tiles around it. Open every safe tile to clear the field.
Flag a tile with a long-press, or turn on Flag mode and tap. Flag every neighbor of a number and tap that number to open the rest (a chord).
Your first tap is always safe and usually opens a wide patch. Boards are built to be solvable with logic — no forced 50/50s.
Classic rules. Nuka paint. Same orange as the rest of the Hub.