Still one star per row, column, and region — but at 8 × 8 you can no longer brute-force the board visually. This is the size where the classic Star Battle techniques earn their keep: watching for regions squeezed into a single row or column, and counting which rows a group of regions must occupy.
Comfortable here? The 10 × 10 grid introduces the two-star format that daily players consider the real thing. For technique walkthroughs, see the how-to-play guide.