Download or read book Jigsaw Sudoku: 400 Hard to Very Hard Jigsaw Sudoku Puzzles written by Mindful Puzzle Books and published by Irregularly Shaped Sudoku. This book was released on 2018-10-11 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Also the puzzle may contain the regions of random (irregular) shape; this variant is called Jigsaw Sudoku ("Geometry Sudoku," "Geometry Number Place," "Irregular Sudoku," "Kikagaku Nanpure").