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Book Sudoku 252 Very Easy to Extreme Puzzles

    Book Details:
  • Author : Matrix Puzzles
  • Publisher : Createspace Independent Publishing Platform
  • Release : 2018-03-18
  • ISBN : 9781986610285
  • Pages : 208 pages

Download or read book Sudoku 252 Very Easy to Extreme Puzzles written by Matrix Puzzles and published by Createspace Independent Publishing Platform. This book was released on 2018-03-18 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Become a Sudoku Master! Whatever Your Level, You'll Love This Sudoku Puzzle Book! This Book Features The Following: · 42 Very Easy Sudoku 9x9 Puzzles · 42 Easy Sudoku 9x9 Puzzles · 42 Medium Sudoku 9x9 Puzzles · 42 Hard Sudoku 9x9 Puzzles · 42 Very Hard Sudoku 9x9 Puzzles · 42 Extreme Sudoku 9x9 Puzzles High quality symmetrical puzzles. Two puzzles per page, set out in a 5.25x8 inch format. Full solutions for all puzzles at the back of the book. Plenty of white space for number scribbling. High quality paperback, not magazine quality. The book is small in size but the numbers are printed in large font, easy to read. Every puzzle in this book has been carefully checked to ensure that each puzzle has only one possible solution. Lots of Fun! No Math Skills Needed! The Perfect Gift for All Ages! GET YOUR COPY NOW!

Book Hyper Sudoku 9x9   Easy to Extreme   Volume 1   276 Puzzles

Download or read book Hyper Sudoku 9x9 Easy to Extreme Volume 1 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-20 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. Become a master in solving Hyper Sudoku 9x9. After solving all the puzzles in this book, you will be a Hyper Sudoku Pro. You start with easy Hyper Sudoku puzzles and you gradually build your way up to extremely difficult Hyper Sudoku puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Hyper Sudoku 9x9 - Easy to Extreme is a collection of 276 puzzles: 54 easy Hyper Sudoku 9x9 puzzles 54 medium Hyper Sudoku 9x9 puzzles 54 hard Hyper Sudoku 9x9 puzzles 54 extreme Hyper Sudoku 9x9 puzzles 60 extra logic puzzles The goal of Hyper Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. Furthermore, Hyper Sudoku contains four colored regions, each colored region contains each number exactly once. I guarantee that every logic puzzle in this Hyper Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other PuzzleBooks.net books. Hyper Sudoku is also known as Windoku, Four-Box Sudoku, Hypersudoku, NRC Sudoku and Four-Square Sudoku.

Book Outside Sudoku   Easy to Extreme   Volume 1   276 Puzzles

Download or read book Outside Sudoku Easy to Extreme Volume 1 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2015-08-15 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. Become a master in solving Outside Sudoku. After solving all the puzzles in this book, you will be a Outside Sudoku Pro. You start with easy Outside Sudoku puzzles and you gradually build your way up to extremely difficult Outside Sudoku puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Outside Sudoku - Easy to Extreme is a collection of 276 puzzles: 54 easy Outside Sudoku puzzles 54 medium Outside Sudoku puzzles 54 hard Outside Sudoku puzzles 54 extreme Outside Sudoku puzzles 60 extra logic puzzles The goal of Outside Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. Some digits are given outside the grid. These digits must appear in the first three cells in the corresponding direction. I guarantee that every logic puzzle in this Outside Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other English PuzzleBooks.net books.

Book Jigsaw Sudoku 12x12   Easy to Extreme   Volume 15   276 Puzzles

Download or read book Jigsaw Sudoku 12x12 Easy to Extreme Volume 15 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-19 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Become a master in solving Jigsaw Sudoku. After solving all the puzzle in this book, you will be a Jigsaw Sudoku Pro. You start with easy Jigsaw Sudoku puzzle and you gradually build your way up to extremely difficult Jigsaw Sudoku puzzle. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 large print puzzle per page, with lots of white space for scribbling. Jigsaw Sudoku 12x12 - Easy to Extreme is a collection of 276 puzzle: 54 easy Jigsaw Sudoku 12x12 puzzle 54 medium Jigsaw Sudoku 12x12 puzzle 54 hard Jigsaw Sudoku 12x12 puzzle 54 extreme Jigsaw Sudoku 12x12 puzzle 60 extra logic puzzle The goal of Jigsaw Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. The regions are of irregular shape. I guarantee that every logic puzzle in this Jigsaw Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzle in this book will appear in any of the other English PuzzleBooks.net books. Jigsaw Sudoku is also known as Geometry Sudoku, Irregular Sudoku, Squiggly Sudoku, Kikagaku Nanpure.

Book Anti King Sudoku 9x9   Easy to Extreme   Volume 1   276 Puzzles

Download or read book Anti King Sudoku 9x9 Easy to Extreme Volume 1 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-11-08 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. Become a master in solving Anti-King Sudoku 9x9. After solving all the puzzles in this book, you will be a Anti-King Sudoku Pro. You start with easy Anti-King Sudoku puzzles and you gradually build your way up to extremely difficult Anti-King Sudoku puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Anti-King Sudoku 9x9 - Easy to Extreme is a collection of 276 puzzles: 54 easy Anti-King Sudoku 9x9 puzzles 54 medium Anti-King Sudoku 9x9 puzzles 54 hard Anti-King Sudoku 9x9 puzzles 54 extreme Anti-King Sudoku 9x9 puzzles 60 extra logic puzzles The goal of Anti-King Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. Furthermore equal numbers can be neither orthogonally nor diagonally adjacent. I guarantee that every logic puzzle in this Anti-King Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other PuzzleBooks.net books. Anti-King Sudoku is also known as Touchless Sudoku.

Book Anti Knight Sudoku 9x9   Easy to Extreme   Volume 1   276 Puzzles

Download or read book Anti Knight Sudoku 9x9 Easy to Extreme Volume 1 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-11-08 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. Become a master in solving Anti-Knight Sudoku 9x9. After solving all the puzzles in this book, you will be a Anti-Knight Sudoku Pro. You start with easy Anti-Knight Sudoku puzzles and you gradually build your way up to extremely difficult Anti-Knight Sudoku puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Anti-Knight Sudoku 9x9 - Easy to Extreme is a collection of 276 puzzles: 54 easy Anti-Knight Sudoku 9x9 puzzles 54 medium Anti-Knight Sudoku 9x9 puzzles 54 hard Anti-Knight Sudoku 9x9 puzzles 54 extreme Anti-Knight Sudoku 9x9 puzzles 60 extra logic puzzles The goal of Anti-Knight Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once and all cells at a chess knight move (at a distance of 2 by 1) must hold different numbers. I guarantee that every logic puzzle in this Anti-Knight Sudoku 9x9 puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other PuzzleBooks.net books. Anti-Knight Sudoku is also known as No Knight Step Sudoku.

Book Sudoku Mixed Grids   Easy to Extreme   Volume 36   282 Puzzles

Download or read book Sudoku Mixed Grids Easy to Extreme Volume 36 282 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-09-28 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Become a master in solving different sizes of Sudoku. You get the perfect mix of different sizes of Sudoku to keep you entertained for weeks. After solving all the puzzle in this book, you will be a Sudoku Pro. You start with easy Sudoku puzzle, which keep getting bigger and bigger and you gradually build your way up to extremely difficult Sudoku puzzle. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 large print puzzle per page, with lots of white space for scribbling. Sudoku Mixed Grids - Easy to Extreme is a collection of 282 puzzle: 12 easy Sudoku puzzle per grid size (9x9, 10x10, 12x12, 15x15, 16x16), totaling 60 easy puzzle 12 medium Sudoku puzzle per grid size (9x9, 10x10, 12x12, 15x15, 16x16), totaling 60 medium puzzle 12 hard Sudoku puzzle per grid size (9x9, 10x10, 12x12, 15x15, 16x16), totaling 60 hard puzzle 12 extreme Sudoku puzzle per grid size (9x9, 10x10, 12x12, 15x15, 16x16), totaling 60 extreme puzzle 42 extra logic puzzle The goal of Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. I guarantee that every logic puzzle in this Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzle in this book will appear in any of the other English PuzzleBooks.net books. Sudoku is also known as Number Place, Nanpure, Su Doku. Quite often Sudoku is misspelled as Suduko, Soduko, Sodoku, Sudoko, Suduku or Soduku.

Book Argyle Sudoku   Easy to Extreme   Volume 1   276 Puzzles

Download or read book Argyle Sudoku Easy to Extreme Volume 1 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-11-05 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. Become a master in solving Argyle Sudoku. After solving all the puzzles in this book, you will be a Argyle Sudoku Pro. You start with easy Argyle Sudoku puzzles and you gradually build your way up to extremely difficult Argyle Sudoku puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Argyle Sudoku - Easy to Extreme is a collection of 276 puzzles: 54 easy Argyle Sudoku puzzles 54 medium Argyle Sudoku puzzles 54 hard Argyle Sudoku puzzles 54 extreme Argyle Sudoku puzzles 60 extra logic puzzles The goal of Argyle Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1-9 exactly once. Furthermore, Argyle Sudoku contains additional diagonals. Every marked diagonal line contains each number not more than once. I guarantee that every logic puzzle in this Argyle Sudoku X puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other PuzzleBooks.net books.

Book Large Sudoku 12x12   Easy to Extreme   Volume 15   276 Puzzles

Download or read book Large Sudoku 12x12 Easy to Extreme Volume 15 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-09-21 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Become a master in solving Sudoku. After solving all the puzzle in this book, you will be a Sudoku Pro. You start with easy Sudoku puzzle and you gradually build your way up to extremely difficult Sudoku puzzle. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 large print puzzle per page, with lots of white space for scribbling. Large Sudoku 12x12 - Easy to Extreme is a collection of 276 puzzle: 54 easy Sudoku 12x12 puzzle 54 medium Sudoku 12x12 puzzle 54 hard Sudoku 12x12 puzzle 54 extreme Sudoku 12x12 puzzle 60 extra logic puzzle The goal of Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. I guarantee that every logic puzzle in this Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzle in this book will appear in any of the other English PuzzleBooks.net books. Sudoku is also known as Number Place, Nanpure, Su Doku. Quite often Sudoku is misspelled as Suduko, Soduko, Sodoku, Sudoko, Suduku or Soduku.

Book Sudoku X 10x10   Easy to Extreme   Volume 2   276 Puzzles

Download or read book Sudoku X 10x10 Easy to Extreme Volume 2 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-20 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Become a master in solving Sudoku X. After solving all the puzzle in this book, you will be a Sudoku X Pro. You start with easy Sudoku X puzzle and you gradually build your way up to extremely difficult Sudoku X puzzle. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 large print puzzle per page, with lots of white space for scribbling. Sudoku X 10x10 - Easy to Extreme is a collection of 276 puzzle: 54 easy Sudoku X 10x10 puzzle 54 medium Sudoku X 10x10 puzzle 54 hard Sudoku X 10x10 puzzle 54 extreme Sudoku X 10x10 puzzle 60 extra logic puzzle The goal of Sudoku X is to fill in the empty cells, one number in each, so that each column, row, region, and the two main diagonals contain each number exactly once. I guarantee that every logic puzzle in this Sudoku X puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzle in this book will appear in any of the other English PuzzleBooks.net books. Sudoku X is also known as Diagonal Sudoku, Kokonotsu, Taikakusen Nanpure, Diagonal Line Number Place, Sudoku-X.

Book Classic Sudoku 9x9   Easy to Extreme   Volume 1   276 Puzzles

Download or read book Classic Sudoku 9x9 Easy to Extreme Volume 1 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-09-11 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Become a master in solving Sudoku. After solving all the puzzle in this book, you will be a Sudoku Pro. You start with easy Sudoku puzzle and you gradually build your way up to extremely difficult Sudoku puzzle. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 large print puzzle per page, with lots of white space for scribbling. Classic Sudoku 9x9 - Easy to Extreme is a collection of 276 puzzle: 54 easy Sudoku 9x9 puzzle 54 medium Sudoku 9x9 puzzle 54 hard Sudoku 9x9 puzzle 54 extreme Sudoku 9x9 puzzle 60 extra logic puzzle The goal of Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. I guarantee that every logic puzzle in this Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzle in this book will appear in any of the other English PuzzleBooks.net books. Sudoku is also known as Number Place, Nanpure, Su Doku. Quite often Sudoku is misspelled as Suduko, Soduko, Sodoku, Sudoko, Suduku or Soduku.

Book Oh My Sudoku  500 Hard and Extreme Sudoku Puzzles

Download or read book Oh My Sudoku 500 Hard and Extreme Sudoku Puzzles written by J. D. Cross and published by . This book was released on 2021-02-10 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: All new 500 Hard and Extreme Sudoku Puzzles for adults! 500 Sudoku Puzzles for beginners and pros! 248 Hard level and 252 Extreme Level Sudoku Puzzles sure to challenge you! Sudoku Puzzles are perfect for family fun! Great for adults and kids. Wide Margins makes for tearing out puzzles easy to take with you. Great for training your brain and staying sharp. Includes a free downloadable Sudoku Mastery guide!

Book Sudoku X 9x9   Easy to Extreme   Volume 1   276 Puzzles

Download or read book Sudoku X 9x9 Easy to Extreme Volume 1 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-20 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Become a master in solving Sudoku X. After solving all the puzzle in this book, you will be a Sudoku X Pro. You start with easy Sudoku X puzzle and you gradually build your way up to extremely difficult Sudoku X puzzle. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 large print puzzle per page, with lots of white space for scribbling. Sudoku X 9x9 - Easy to Extreme is a collection of 276 puzzle: 54 easy Sudoku X 9x9 puzzle 54 medium Sudoku X 9x9 puzzle 54 hard Sudoku X 9x9 puzzle 54 extreme Sudoku X 9x9 puzzle 60 extra logic puzzle The goal of Sudoku X is to fill in the empty cells, one number in each, so that each column, row, region, and the two main diagonals contain each number exactly once. I guarantee that every logic puzzle in this Sudoku X puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzle in this book will appear in any of the other English PuzzleBooks.net books. Sudoku X is also known as Diagonal Sudoku, Kokonotsu, Taikakusen Nanpure, Diagonal Line Number Place, Sudoku-X.

Book Jigsaw Sudoku 9x9   Easy to Extreme   Volume 1   276 Puzzles

Download or read book Jigsaw Sudoku 9x9 Easy to Extreme Volume 1 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-18 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Become a master in solving Jigsaw Sudoku. After solving all the puzzle in this book, you will be a Jigsaw Sudoku Pro. You start with easy Jigsaw Sudoku puzzle and you gradually build your way up to extremely difficult Jigsaw Sudoku puzzle. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 large print puzzle per page, with lots of white space for scribbling. Jigsaw Sudoku 9x9 - Easy to Extreme is a collection of 276 puzzle: 54 easy Jigsaw Sudoku 9x9 puzzle 54 medium Jigsaw Sudoku 9x9 puzzle 54 hard Jigsaw Sudoku 9x9 puzzle 54 extreme Jigsaw Sudoku 9x9 puzzle 60 extra logic puzzle The goal of Jigsaw Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. The regions are of irregular shape. I guarantee that every logic puzzle in this Jigsaw Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzle in this book will appear in any of the other English PuzzleBooks.net books. Jigsaw Sudoku is also known as Geometry Sudoku, Irregular Sudoku, Squiggly Sudoku, Kikagaku Nanpure.

Book Sudoku X 12x12   Easy to Extreme   Volume 3   276 Puzzles

Download or read book Sudoku X 12x12 Easy to Extreme Volume 3 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-20 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Become a master in solving Sudoku X. After solving all the puzzle in this book, you will be a Sudoku X Pro. You start with easy Sudoku X puzzle and you gradually build your way up to extremely difficult Sudoku X puzzle. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 large print puzzle per page, with lots of white space for scribbling. Sudoku X 12x12 - Easy to Extreme is a collection of 276 puzzle: 54 easy Sudoku X 12x12 puzzle 54 medium Sudoku X 12x12 puzzle 54 hard Sudoku X 12x12 puzzle 54 extreme Sudoku X 12x12 puzzle 60 extra logic puzzle The goal of Sudoku X is to fill in the empty cells, one number in each, so that each column, row, region, and the two main diagonals contain each number exactly once. I guarantee that every logic puzzle in this Sudoku X puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzle in this book will appear in any of the other English PuzzleBooks.net books. Sudoku X is also known as Diagonal Sudoku, Kokonotsu, Taikakusen Nanpure, Diagonal Line Number Place, Sudoku-X.

Book Sudoku Puzzles Book for Adults 500  Puzzles with Full Solutions   Extreme  Ultra Extreme

Download or read book Sudoku Puzzles Book for Adults 500 Puzzles with Full Solutions Extreme Ultra Extreme written by Dreambrain Uchqun and published by . This book was released on 2020-10-23 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku puzzles book for adults 500+ Sudoku puzzles book includes full solutions - 2 Levels of difficulty Extreme and Ultra Extreme Puzzles. Great for Extreme Sudoku Lovers Includes FREE BONUS PUZZLES downloadable Includes instructions and techniques for complete beginners 2 difficulties 252 Extreme, 252 Ultra Extreme Every puzzle in this sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 possible solution Easy to tear out, thanks to wide margins Size of the book: 8.5 X 11 Includes full solutions (end of the book)

Book Sudoku 15x15   Easy to Extreme   Volume 22   276 Puzzles

Download or read book Sudoku 15x15 Easy to Extreme Volume 22 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-09-26 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Become a master in solving Sudoku. After solving all the puzzle in this book, you will be a Sudoku Pro. You start with easy Sudoku puzzle and you gradually build your way up to extremely difficult Sudoku puzzle. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 large print puzzle per page, with lots of white space for scribbling. Sudoku 15x15 - Easy to Extreme is a collection of 276 puzzle: 54 easy Sudoku 15x15 puzzle 54 medium Sudoku 15x15 puzzle 54 hard Sudoku 15x15 puzzle 54 extreme Sudoku 15x15 puzzle 60 extra logic puzzle The goal of Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. I guarantee that every logic puzzle in this Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzle in this book will appear in any of the other English PuzzleBooks.net books. Sudoku is also known as Number Place, Nanpure, Su Doku. Quite often Sudoku is misspelled as Suduko, Soduko, Sodoku, Sudoko, Suduku or Soduku.