Patchwork (also known as "Tatami") consists of a square grid divided into regions ("rooms").Each room must be filled with each of the digits from 1 to the number of cells in the room.Every row and every column must contain the same amount of each digit.Same digits must not be orthogonally adjacent. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Experts In the book you will find a description and examples of solutions for all puzzles.The book is for those who like logic and math problems. Decide, developing and improving.