Spiral galaxies is a region based logic puzzle where the grid is divided up into smaller regions.
The objective is to divide the whole grid into smaller regions, "galaxies", subject to the following rules:
- The grid is divided up into regions along the grid lines.
- Each region must have rotational symmetry and must contain exactly one circle, which is at the centre of its rotational symmertry.
A standard 10x10 spiral galaxies and its solution.