Pocket Sudoku Level Hard 100 Puzzles

Sudoku keeps your brain logical thinking, even at a young age. Sudoku improves critical thinking and making quick decisions based upon available evidence.

Sudoku is not only fun and interesting. It is a brain game that helps to train the brain of you and your child. Sudoku also demands attention to detail - noticing patterns and finding the right moment to make a move.

These series have four different levels: easy, normal, hard, and expert. This book is easy level.
if you need other levels, please check "Mike Murphy Sudoku".

Sudoku hard level vol.1 Details
- Small Print (5x8) to easily take with
- 100 Hard Level Sudoku Puzzles Collection

How to play?
The goal of Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1 to 9 exactly once.

Pocket Sudoku: Level Easy ASIN: 1984096001

Pocket Sudoku: Level normal ASIN: 1984137085

Pocket Sudoku: Level Hard ASIN: 1983404314

Pocket Sudoku: Level Expert ASIN: 1984146394

Pocket X-Sudoku: Level Easy ASIN: 1985412640

Pocket X-Sudoku: Level Expert ASIN: 1985317117

Pocket Sudoku Level Expert 30 mini 4*6 ASIN: 1986303470