In this Nikoli puzzle, a grid is divided into regions, and some cells have moon or sun symbols. Draw a closed loop that enters and exits each region once. The loop must pass through all the suns and no moons, or all the moons and no suns, in each region, and it must alternate passing through suns in one region and moons in the next.
Puzzles
MIT Mystery Hunt 2022 Dancing Triangles
MIT Mystery Hunt 2023 Book of Fixed Stars
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