by TheTimesMindGames (Author)
These are previously unpublished quality Su Doku grids from The Times, and help to develop you to take on Extreme Su Doku.
The 200 puzzles in this collection of treacherously difficult puzzles will stretch even the most advanced Su Doku enthusiast. You will need to use all of your best solving techniques to get to the end of this testing challenge.
The puzzles in the collection are of the highest quality and are perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles.
Guaranteed to provide hours of mind-stretching entertainment.
Format: Paperback
Pages: 272
Publisher: Times Books
Published: 30 Apr 2020
ISBN 10: 0008342954
ISBN 13: 9780008342951