(also known as " ", " " or " ") is a logic-based, combinatorial number-placement puzzle. are very similar to regular Sudoku puzzles. Regular 10x10 Sudoku that row and column rules apply, but instead of a 5x2 grid they are ten Jigsaw shapes. The puzzle book contain: • 200 Puzzles • Handy 6 x 9 inch Book Layout • 2 Puzzles per Page • Ideal for both Beginners and 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.