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Extreme Sudoku 500 Puzzles
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Book Synopsis 1000 Sudoku Puzzles 500 Medium & 500 Hard by : Jubliant Puzzle Book
Download or read book 1000 Sudoku Puzzles 500 Medium & 500 Hard written by Jubliant Puzzle Book and published by . This book was released on 2019-08-31 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enjoy the most popular puzzle game in the world! whether you want to keep your brain young and active, develop logical thinking or just keep yourself busy to avoid boredom... this book will help you with its unique Sudoku Puzzle. 1000 Sudoku Puzzles and Solutions. (2 Level Difficulty) 500 Medium & 500 Hard Level Puzzle 6 Puzzle per page 8.5 x 11 (inches) 21.59cm x 27.94cm Perfect as a gift for sudoku
Book Synopsis Sudoku X 15x15 - Easy to Extreme - Volume 4 - 276 Puzzles by : Nick Snels
Download or read book Sudoku X 15x15 - Easy to Extreme - Volume 4 - 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 15x15 - Easy to Extreme is a collection of 276 puzzle: 54 easy Sudoku X 15x15 puzzle 54 medium Sudoku X 15x15 puzzle 54 hard Sudoku X 15x15 puzzle 54 extreme Sudoku X 15x15 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 Synopsis Sudoku X 15x15 - Hard to Extreme - Volume 9 - 276 Puzzles by : Nick Snels
Download or read book Sudoku X 15x15 - Hard to Extreme - Volume 9 - 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-11-23 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 15x15 - Hard to Extreme is a collection of 276 puzzle: 108 hard Sudoku X 15x15 puzzle 108 extreme Sudoku X 15x15 puzzle 60 extra logic puzzle 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 Synopsis Anti-Knight Sudoku 12x12 - Easy to Extreme - Volume 3 - 276 Puzzles by : Nick Snels
Download or read book Anti-Knight Sudoku 12x12 - Easy to Extreme - Volume 3 - 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 12x12. 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 12x12 - Easy to Extreme is a collection of 276 puzzles: 54 easy Anti-Knight Sudoku 12x12 puzzles 54 medium Anti-Knight Sudoku 12x12 puzzles 54 hard Anti-Knight Sudoku 12x12 puzzles 54 extreme Anti-Knight Sudoku 12x12 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 12x12 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 Synopsis Large Sudoku 12x12 - Easy to Extreme - Volume 15 - 276 Puzzles by : Nick Snels
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 Synopsis Anti Diagonal Sudoku 16x16 - Easy to Extreme - Volume 2 - 276 Puzzles by : Nick Snels
Download or read book Anti Diagonal Sudoku 16x16 - Easy to Extreme - Volume 2 - 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 Diagonal Sudoku 16x16. After solving all the puzzles in this book, you will be a Anti Diagonal Sudoku Pro. You start with easy Anti Diagonal Sudoku puzzles and you gradually build your way up to extremely difficult Anti Diagonal Sudoku puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Anti Diagonal Sudoku 16x16 - Easy to Extreme is a collection of 276 puzzles: 54 easy Anti Diagonal Sudoku 16x16 puzzles 54 medium Anti Diagonal Sudoku 16x16 puzzles 54 hard Anti Diagonal Sudoku 16x16 puzzles 54 extreme Anti Diagonal Sudoku 16x16 puzzles 60 extra logic puzzles The goal of Anti Diagonal 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 each diagonal has at most three different numbers for 9x9 grids and at most four different numbers for 16x16 grids. I guarantee that every logic puzzle in this Anti Diagonal 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.
Book Synopsis Classic Puzzle : 300 Sudoku Puzzles - Printable PDF Book (75 Easy, 75 Medium, 75 Hard and 75 Extreme Mind Games) by : Attila Molnar
Download or read book Classic Puzzle : 300 Sudoku Puzzles - Printable PDF Book (75 Easy, 75 Medium, 75 Hard and 75 Extreme Mind Games) written by Attila Molnar and published by Classic Puzzle Australia. This book was released on with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Classic Puzzle: 300 Sudoku Puzzles has a collection of 300 unique sudoku puzzles with various difficulty levels. If you like solving puzzles the book will keep you entertained for many hours, days or even weeks. It is a perfect gift for a loved one! The book contains: - 75 Sudoku Puzzles (Easy) - 75 Sudoku Puzzles (Medium) - 75 Sudoku Puzzles (Hard) - 75 Sudoku Puzzles (Extreme)
Book Synopsis Mega Sudoku 16x16 Deluxe - Easy to Extreme - Volume 35 - 468 Puzzles by : Nick Snels
Download or read book Mega Sudoku 16x16 Deluxe - Easy to Extreme - Volume 35 - 468 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-09-27 with total page 293 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. Mega Sudoku 16x16 Deluxe - Easy to Extreme is a collection of 468 puzzle: 102 easy Sudoku 16x16 puzzle 102 medium Sudoku 16x16 puzzle 102 hard Sudoku 16x16 puzzle 102 extreme Sudoku 16x16 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 Synopsis Mega Sudoku 16x16 - Easy to Extreme - Volume 29 - 276 Puzzles by : Nick Snels
Download or read book Mega Sudoku 16x16 - Easy to Extreme - Volume 29 - 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-09-27 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. Mega Sudoku 16x16 - Easy to Extreme is a collection of 276 puzzle: 54 easy Sudoku 16x16 puzzle 54 medium Sudoku 16x16 puzzle 54 hard Sudoku 16x16 puzzle 54 extreme Sudoku 16x16 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 Synopsis Solve Extreme Sudoku by : Robert Emmert
Download or read book Solve Extreme Sudoku written by Robert Emmert and published by iUniverse. This book was released on 2015-11-04 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: After a short discussion of Sudoku and presentation of tools in Section 1, this book gives a review of standard techniques or strategies to solve these puzzles in Section 2. Section 3 will treat advanced solution techniques that will allow the most difficult puzzles to be solved. The primary focus of the book is on this section, and the reader should find these techniques easy to apply to achieve success. Section 4 gives 14 exercises that will allow the reader to practice the techniques given in section 3. These exercises, with solutions, provide additional instructions on the application of section 3 techniques. Section 5 gives 16 puzzles to solve, with answers. The first 4 puzzles are for warm up and are labeled Evil. The 12 puzzles that follow the Evil puzzles are very difficult and are labeled Extreme. This section could be considered a graduation exercise.
Book Synopsis Anti-King Sudoku 16x16 - Easy to Extreme - Volume 5 - 276 Puzzles by : Nick Snels
Download or read book Anti-King Sudoku 16x16 - Easy to Extreme - Volume 5 - 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 16x16. 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 16x16 - Easy to Extreme is a collection of 276 puzzles: 54 easy Anti-King Sudoku 16x16 puzzles 54 medium Anti-King Sudoku 16x16 puzzles 54 hard Anti-King Sudoku 16x16 puzzles 54 extreme Anti-King Sudoku 16x16 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 Synopsis Sudoku Mixed Grids - Easy to Extreme - Volume 36 - 282 Puzzles by : Nick Snels
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 Synopsis Anti-Knight Sudoku 15x15 - Easy to Extreme - Volume 4 - 276 Puzzles by : Nick Snels
Download or read book Anti-Knight Sudoku 15x15 - Easy to Extreme - Volume 4 - 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 15x15. 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 15x15 - Easy to Extreme is a collection of 276 puzzles: 54 easy Anti-Knight Sudoku 15x15 puzzles 54 medium Anti-Knight Sudoku 15x15 puzzles 54 hard Anti-Knight Sudoku 15x15 puzzles 54 extreme Anti-Knight Sudoku 15x15 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 15x15 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 Synopsis Mega Sudoku 16x16 - Extreme - Volume 33 - 276 Puzzles by : Nick Snels
Download or read book Mega Sudoku 16x16 - Extreme - Volume 33 - 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-09-27 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! Sudoku is a fun and addicting logic puzzle game that has taken the world by storm. This book is ideal if you are a Sudoku expert. In this book, you find the most extreme Sudoku puzzle ever. 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. Mega Sudoku 16x16 - Extreme is a collection of 276 puzzle: 216 extreme Sudoku 16x16 puzzle 60 extra logic puzzle 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 Synopsis Sudoku 15x15 - Extreme - Volume 26 - 276 Puzzles by : Nick Snels
Download or read book Sudoku 15x15 - Extreme - Volume 26 - 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-09-27 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! Sudoku is a fun and addicting logic puzzle game that has taken the world by storm. This book is ideal if you are a Sudoku expert. In this book, you find the most extreme Sudoku puzzle ever. 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 - Extreme is a collection of 276 puzzle: 216 extreme Sudoku 15x15 puzzle 60 extra logic puzzle 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 Synopsis Sudoku X 16x16 - Hard to Extreme - Volume 10 - 276 Puzzles by : Nick Snels
Download or read book Sudoku X 16x16 - Hard to Extreme - Volume 10 - 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-11-23 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 16x16 - Hard to Extreme is a collection of 276 puzzle: 108 hard Sudoku X 16x16 puzzle 108 extreme Sudoku X 16x16 puzzle 60 extra logic puzzle 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 Synopsis Mega Sudoku 16x16 Large Print - Easy to Extreme - Volume 34 - 276 Puzzles by : Nick Snels
Download or read book Mega Sudoku 16x16 Large Print - Easy to Extreme - Volume 34 - 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-09-27 with total page 311 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. Mega Sudoku 16x16 Large Print - Easy to Extreme is a collection of 276 puzzle: 54 easy Sudoku 16x16 puzzle 54 medium Sudoku 16x16 puzzle 54 hard Sudoku 16x16 puzzle 54 extreme Sudoku 16x16 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.