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Are you ready for a challenge? The Sudoku-X Puzzle Book for experts contains 200 very difficult Sudoku-X puzzles. If you like extreme Sudoku-X puzzles, this series of books will be the ideal companion for you.
Even though the puzzles are very difficult, each one can be solved with logic and advanced solving techniques, unlike some extreme puzzles that require you to guess and then work back if the solution turns out to be incorrect.
If you are new to Sudoku-X puzzles, the only difference you need to be aware of is that both diagonal lines of shaded cells (running from corner to corner) must also contain the numbers 1-9, with only one instance of each number allowed in any one diagonal.
- 200 Very Hard Sudoku-X Puzzles
- 6 x 9 inch Layout
- All Puzzles Have Logical Solutions (No Guessing Required)
- 2 Puzzles per Page
- Solutions Included
The Black Book Series is available in the following formats: Sudoku, Jigsaw Sudoku, Sudoku-X and Jigsaw Sudoku-X
Series:Sudoku-X Black Book (Book 1)
Publisher:Independently published (March 13, 2019)
Product Dimensions: 6 x 0.3 x 9 inches
Shipping Weight:5 ounces