Shirokuro is a logic puzzle invented by Nikoli. It contains white and black circles. The task is to connect each white circle with a black circle by a horizontal or vertical line. Lines are not allowed to cross other lines. The line between two circles may not pass through other circles.
| Author: Ted Warner |
| Publisher: Independently Published |
| Publication Date: May 14, 2018 |
| Number of Pages: 115 pages |
| Language: English |
| Binding: Paperback |
| ISBN-10: 1981094865 |
| ISBN-13: 9781981094868 |