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").

Jigsaw Sudoku Puzzle Book If you like Sudoku but want an extra challenge then you will love Jigsaw Sudoku. The goal of Jigsaw Sudoku (also know as irregular sudoku) is similar to normal Sudoku. You must place each of the numbers 1 to 9 into each of the rows and columns. However in Jigsaw Sudoku the normal 3x3 Sudoku regions are instead replaced by jigsaw-like regions of different sizes (outlined with the bold lines) that must contain every number. This Jigsaw Sudoku Puzzle Book is a fun way for teens or adults to sharpen their minds and test their logic. Including 156 Puzzles of varying difficulty to keep you entertained for hours. Book Features: Loads of Puzzles: 48 Easy, 54 Medium and 54 Hard Large print - 2 Puzzles per page - Plenty of Space Suitable for all Levels: Beginner to Expert Perfectly Sized - 7" x 10" Premium Matte Color cover design Puzzle King Publishing: Puzzle Books for Everyone!

If you like solving Sudoku puzzles you are going to love the Variety Sudoku Puzzle Book Series. Keep the brain active and improve your Sudoku solving skills. Featuring Standard Sudoku, Sudoku-X, Jigsaw Sudoku and Killer Sudoku, the Variety Sudoku Puzzle Book is the ideal companion for both Sudoku beginners and fanatics alike. Please Note: This is part of the Medium difficulty series and may require some advanced solving techniques. * Extra-large 8.5 x 11 Inch Book Size * 100+ Standard Sudoku Puzzles* 100+ Sudoku-X Puzzles* 100+ Jigsaw Sudoku Puzzles* 100+ Killer Sudoku Puzzles* 6 Puzzles per Page* Solutions to all Puzzles Included* Introduction to Each Puzzle Type* Bonus Puzzles Included* Ideal for Intermediate Solvers

Includes, beginning Sept. 15, 1954 (and on the 15th of each month, Sept.-May) a special section: School library journal, ISSN 0000-0035, (called Junior libraries, 1954-May 1961). Also issued separately.

THE BIGGEST SUDOKU COLLECTION YET Carol Vorderman, international Sudoku expert, has done it again! In Master Sudoku, she introduced America to the popular new number logic game, taking players from novice to expert in 200 puzzles. Now, she brings us Carol Vorderman’s Massive Book of Sudoku, the largest collection ever—containing more than 400 puzzles ranging from easy to super difficult, as well as several new, ultrachallenging kinds of Sudoku for you to try. Also included here are the rules of Sudoku and Carol’s insider tips, so that even a beginner can become a master. Carol Vorderman’s Massive Book of Sudoku is perfect for the already addicted Sudokuist or any puzzle lover just discovering the game that’s sweeping the world.