Place a digit from 1 to 9 into each of the empty cells so that each digit appears exactly once in each row, column and 3x3 outlined box. Additionally every main/marked diagonal contains only 3 different numbers
- | Author: Alexander Rodriguez
- | Publisher: CreateSpace Independent Publishing Platform
- | Publication Date: Mar 13, 2018
- | Number of Pages: 50 pages
- | Language: English
- | Binding: Paperback
- | ISBN-10: 198643916X
- | ISBN-13: 9781986439169