Difficult Sudoku Book: 200 Difficult Sudoku Puzzles

By djape

This is a book of difficult Sudoku puzzles.Some of the puzzles require you to applyadvanced Sudoku solving techniques suchas X-Wing or Swordfish.
However, all puzzles can be solved withoutguessing and have one solution only. If you need help, you can always peek at the solutions.
Remember: do not guess
The book is small in size but the numbers areprinted in large font, easy to read.
All puzzles in this book are NEW, previously unpublished

• Format: Paperback
• Language: English
• ISBN: 151411786X
• ISBN13: 9781514117866
• Release Date: May 2015
• Publisher: Createspace Independent Publishing Platform
• Length: 120 Pages
• Weight: 0.28 lbs.
• Dimensions: 0.3" x 5.0" x 8.0"