Moonsun ("Moon or Sun") is a logic puzzle invented by Nikoli. A rectangular or square grid is divided into regions. A grid contains black and white circles in some cells. The aim is to draw a single non-intersecting loop. The loop must cross borders of each region exactly twice. In a region, the loop must visit either all cells with black circles or all cells with white circles. Regions with visited black circles must alternate with regions, where white circles were visited.
| Author: Ted Warner |
| Publisher: Independently published |
| Publication Date: May 12, 2018 |
| Number of Pages: 115 pages |
| Language: English |
| Binding: Paperback |
| ISBN-10: 1981082042 |
| ISBN-13: 9781981082049 |