250 Championship Very Hard Level Puzzles - 6 X 6 - Gold Series Sudoku
Subtitle: 50 Killer Anti-Knight + 50 Skyscraper Diagonal + 50 Hikaku Diagonal + 50 Even-Odd Diagonal + 50 Neighbors Diagonal. Vol. 3. Book for Your Mood
Publisher: CreateSpace Independent Publishing Platform
Published: 2018
Language: eng
Number of pages: 150
ISBN-13: 9781717003850