Tons of Hitori for Adults & Seniors

Hitori is a logical puzzle with simple rules and challenging solutions. The puzzle is played on a grid of squares or cells. At the beginning, each cell contains a number. The goal is to paint out some cells so that there are no duplicate numbers in any row or column.
This Logic Puzzles book is packed with the following features:
- 1000 Hitori (10x10) Puzzles for everyone in 3 Difficulty Levels: 333 Easy, 334 Medium, 333 Hard.
- Answers to every puzzle are provided.
- Each puzzle is guaranteed to have only one solution.
- Six puzzles per page (8.5 x 11 inches).
- Includes free bonus puzzles you can download book (Fitness for your brain: Word Search With Hidden Message: Train your brain anywhere, anytime! - 102 Puzzles for Adults and Seniors).