Download or read book Puzzles for Brain - Jigsaw Sudoku 200 Hard Puzzles 9x9 (volume 28) written by Alexander Rodriguez and published by . This book was released on 2020-01-25 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rules of Jigsaw Sudoku are similar to standard Sudoku, since you must place each of the numbers 1 to 9 (or 1 to whatever the size of the puzzle is) into each of the rows and columns. However whereas standard Sudoku also has rectangular boxes that must each contain every number, in Jigsaw Sudoku these boxes are replaced by different bold-lined shapes that must each contain every number instead.