Sudoku Big Book Suguru - 500 Hard to Master Puzzles 9x9 (Volume 21)

Suguru (also known as "Number Blocks") is a logic puzzle that has simple rules, but which provides sufficient challenges to satisfy the most enthusiastic solvers!The task consists of a rectangular or square grid divided into regions. Each region must be filled with each of the digits from 1 to the number of cells in the region. Cells with the same digits must not be orthogonally or diagonally adjacent. Even though the rules are simple, you will need all your skills to solve it. The puzzle books series contain:
- 250 Hard Puzzles
- 250 Master Puzzles
- Handy 6 x 9 inch Book Layout
- 6 Puzzles per Page
- Ideal for Experts The book is for those who like logic and math problems. Decide, developing and improving.