(also known as " ", " " or " ") is a logic-based, combinatorial number-placement puzzle. are very similar to regular Sudoku puzzles. Regular 9x9 Sudoku that row and column rules apply, but instead of a 3x3 grid they are nine Jigsaw shapes. The puzzle book contain: • 200 Puzzles • Handy 6 x 9 inch Book Layout • 2 Puzzles per Page • Ideal for Beginners 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.