Download or read book Killer Sudoku 9x9 Easy to Hard Volume 1 270 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-04 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 Killer Sudoku 9x9. After solving all the puzzles in this book, you will be a Killer Sudoku Pro. You start with easy Killer Sudoku puzzles and you gradually build your way up to extremely hard Killer Sudoku puzzles. Killer Sudoku 9x9 - Easy to Hard is a collection of 270 puzzles: 72 easy Killer Sudoku 9x9 puzzles 72 medium Killer Sudoku 9x9 puzzles 72 hard Killer Sudoku 9x9 puzzles 54 extra logic puzzles I guarantee that every logic puzzle in this Killer 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. Killer Sudoku is also known as Sums Sudoku, Sumdoku, Sum Doku, Addoku, Killer Su Doku, Samunamupure, Kikagaku Nampure, Samu Nanpure, Sums Number Place.

Download or read book Killer Sudoku 9x9 Deluxe Easy to Hard Volume 6 462 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-08 with total page 292 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 Killer Sudoku 9x9. After solving all the puzzles in this book, you will be a Killer Sudoku Pro. You start with easy Killer Sudoku puzzles and you gradually build your way up to extremely hard Killer Sudoku puzzles. The goal of Killer 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 sum of all numbers in a cage (indicated by the dashed lines) must match the small number printed in its corner. No number can be repeated within a cage. Killer Sudoku 9x9 Deluxe - Easy to Hard is a collection of 462 puzzles: 136 easy Killer Sudoku 9x9 puzzles 136 medium Killer Sudoku 9x9 puzzles 136 hard Killer Sudoku 9x9 puzzles 54 extra logic puzzles I guarantee that every logic puzzle in this Killer 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. Killer Sudoku is also known as Sums Sudoku, Sumdoku, Sum Doku, Addoku, Killer Su Doku, Samunamupure, Kikagaku Nampure, Samu Nanpure, Sums Number Place.

Download or read book Killer Sudoku 9x9 Easy Volume 2 270 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-04 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. Killer Sudoku is a fun and addicting logic puzzle game that combines Sudoku with an addition math game. Killer Sudoku is a fun way for kids and adults to practice addition facts. Once you pick up this book, you won't be able to put it back down. You have been warned! The goal of Killer 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 sum of all numbers in a cage (indicated by the dashed lines) must match the small number printed in its corner. No number can be repeated within a cage. Killer Sudoku 9x9 - Easy is a collection of 270 puzzles: 216 easy Killer Sudoku 9x9 puzzles 54 extra logic puzzles I guarantee that every logic puzzle in this Killer 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. Killer Sudoku is also known as Sums Sudoku, Sumdoku, Sum Doku, Addoku, Killer Su Doku, Samunamupure, Kikagaku Nampure, Samu Nanpure, Sums Number Place.

Download or read book Killer Sudoku 9x9 Large Print Easy to Hard Volume 5 270 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-07 with total page 310 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 Killer Sudoku 9x9. After solving all the puzzles in this book, you will be a Killer Sudoku Pro. You start with easy Killer Sudoku puzzles and you gradually build your way up to extremely hard Killer Sudoku puzzles. Only 1 large print puzzle per page, with lots of white space for scribbling. Killer Sudoku 9x9 Large Print - Easy to Hard is a collection of 270 puzzles: 72 easy Killer Sudoku 9x9 puzzles 72 medium Killer Sudoku 9x9 puzzles 72 hard Killer Sudoku 9x9 puzzles 54 extra logic puzzles I guarantee that every logic puzzle in this Killer 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. Killer Sudoku is also known as Sums Sudoku, Sumdoku, Sum Doku, Addoku, Killer Su Doku, Samunamupure, Kikagaku Nampure, Samu Nanpure, Sums Number Place.

Download or read book Killer Sudoku 9x9 Hard Volume 4 270 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-04 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. Killer Sudoku is a fun and addicting logic puzzle game that combines Sudoku with an addition math game. Killer Sudoku is a fun way for kids and adults to practice addition facts. In this book, you do not need to wade through tons of easy Killer Sudoku puzzles before getting to the real brain teasers. Once you pick up this book, you won't be able to put it back down. You have been warned! Killer Sudoku 9x9 - Hard is a collection of 270 puzzles: 216 hard Killer Sudoku 9x9 puzzles 54 extra logic puzzles I guarantee that every logic puzzle in this Killer 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. Killer Sudoku is also known as Sums Sudoku, Sumdoku, Sum Doku, Addoku, Killer Su Doku, Samunamupure, Kikagaku Nampure, Samu Nanpure, Sums Number Place.

Download or read book Killer Sudoku 9x9 Large Print Easy Volume 25 270 Logic Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-12-20 with total page 310 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. Killer Sudoku is a fun and addicting logic puzzle game that combines Sudoku with an addition math game. Killer Sudoku is a fun way for kids and adults to practice addition facts. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 Killer Sudoku puzzle per page, with lots of white space for scribbling. Killer Sudoku 9x9 Large Print - Easy is a collection of 270 puzzles: 216 easy Killer Sudoku 9x9 puzzles 54 extra logic puzzles The goal of Killer 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 sum of all numbers in a cage (indicated by the dashed lines) must match the small number printed in its corner. No number can be repeated within a cage. I guarantee that every logic puzzle in this Killer 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. Killer Sudoku is also known as Sums Sudoku, Sumdoku, Sum Doku, Addoku, Killer Su Doku, Samunamupure, Kikagaku Nampure, Samu Nanpure, Sums Number Place.

Download or read book CalcuDoku Mixed Grids Easy to Hard Volume 1 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-11 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 CalcuDoku. You will experience CalcuDoku 7x7, CalcuDoku 8x8 and CalcuDoku 9x9. You get the perfect mix of different sizes of CalcuDoku to keep you entertained for weeks. After solving all the puzzles in this book, you will be a CalcuDoku Pro. You start with easy CalcuDoku puzzles, which keep getting bigger and bigger and you gradually build your way up to extremely hard CalcuDoku puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! CalcuDoku Mixed Grids - Easy to Hard is a collection of 276 puzzles: 24 easy CalcuDoku puzzles per grid size, totaling 72 easy puzzles 24 medium CalcuDoku puzzles per grid size, totaling 72 medium puzzles 24 hard CalcuDoku puzzles per grid size, totaling 72 hard puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this CalcuDoku 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. CalcuDoku is also known as Square Wisdom, CanCan, MinuPlu, Mathdoku and Calcu-Doku.

Download or read book Masyu Mixed Grids Easy to Hard 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 Masyu. You will experience Masyu 11x11, Masyu 13x13 and Masyu 15x15. You get the perfect mix of different sizes of Masyu to keep you entertained for weeks. After solving all the puzzles in this book, you will be a Masyu Pro. You start with easy Masyu puzzles, which keep getting bigger and bigger and you gradually build your way up to extremely difficult Masyu puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Masyu Mixed Grids - Easy to Hard is a collection of 276 puzzles: 24 easy Masyu puzzles per grid size, totaling 72 easy puzzles 24 medium Masyu puzzles per grid size, totaling 72 medium puzzles 24 hard Masyu puzzles per grid size, totaling 72 hard puzzles 60 extra logic puzzles The goal of Masyu is to draw a single continuous non-intersecting loop that passes through all circled cells. The loop must enter each cell it passes through from the center of one of its four sides and exit from a different side. All turns are therefore 90 degrees. White circles must be traveled straight through, but the loop must turn in the previous and/or next cell in its path. Black circles must be turned upon, but the loop must travel straight through the next and previous cells in its path. I guarantee that every logic puzzle in this Masyu 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. Masyu is also known as Shiroshinju Kuroshinju, White Pearls and Black Pearls.

Download or read book Binary Puzzles Mixed Grids Easy to Hard Volume 1 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-18 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 Binary Puzzles. You will experience Binary Puzzles with a 10x10, 12x12 and 14x14 grid size. You get the perfect mix of different sizes of Binary Puzzles to keep you entertained for weeks. After solving all the puzzles in this book, you will be a Binary Puzzles Pro. You start with easy Binary Puzzles, which keep getting bigger and bigger and you gradually build your way up to extremely hard Binary Puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Binary Puzzles Mixed Grids - Easy to Hard is a collection of 276 puzzles: 24 easy Binary Puzzles per grid size, totaling 72 easy puzzles 24 medium Binary Puzzles per grid size, totaling 72 medium puzzles 24 hard Binary Puzzles per grid size, totaling 72 hard puzzles 60 extra logic puzzles The goal of a Binary Puzzle is to fill in the grid with the numbers 0 and 1 according to the following rules: There are as many ones as zeros in every row and every column (or one more for odd sized grids). No more than two of the same number can be next to or under each other. Each row is unique, and each column is unique. I guarantee that every logic puzzle in this Binary 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. Binary Puzzles are also known as Takuzu, Tohu wa Vohu and Binero.

Download or read book Killer Sudoku 9x9 Large Print Hard Volume 27 270 Logic Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-12-20 with total page 310 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. Killer Sudoku is a fun and addicting logic puzzle game that combines Sudoku with an addition math game. Killer Sudoku is a fun way for kids and adults to practice addition facts. In this book, you do not need to wade through tons of easy Killer Sudoku puzzles before getting to the real brain teasers. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 Killer Sudoku puzzle per page, with lots of white space for scribbling. Killer Sudoku 9x9 Large Print - Hard is a collection of 270 puzzles: 216 hard Killer Sudoku 9x9 puzzles 54 extra logic puzzles The goal of Killer 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 sum of all numbers in a cage (indicated by the dashed lines) must match the small number printed in its corner. No number can be repeated within a cage. I guarantee that every logic puzzle in this Killer 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. Killer Sudoku is also known as Sums Sudoku, Sumdoku, Sum Doku, Addoku, Killer Su Doku, Samunamupure, Kikagaku Nampure, Samu Nanpure, Sums Number Place.

Download or read book Nurikabe Mixed Grids Deluxe Easy to Hard Volume 12 474 Logic Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2016-09-24 with total page 292 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 different sizes of Nurikabe. You get the perfect mix of different sizes of Nurikabe to keep you entertained for weeks. After solving all the puzzles in this book, you will be a Nurikabe Pro. You start with easy Nurikabe puzzles, which keep getting bigger and bigger and you gradually build your way up to extremely difficult Nurikabe puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Nurikabe Mixed Grids Deluxe - Easy to Hard is a collection of 474 puzzles: 48 easy Nurikabe puzzles per grid size (10x10, 12x12, 14x14), totaling 144 easy puzzles 48 medium Nurikabe puzzles per grid size (10x10, 12x12, 14x14), totaling 144 medium puzzles 48 hard Nurikabe puzzles per grid size (10x10, 12x12, 14x14), totaling 144 hard puzzles 42 extra logic puzzles I guarantee that every logic puzzle in this Nurikabe 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. Nurikabe is also known as Cell Structure, Islands in the Stream.

Download or read book Futoshiki For Kids Mixed Grids Easy to Hard Volume 1 145 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-11-14 with total page 98 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. Futoshiki is a fun and addicting logic puzzle game that combines Sudoku with inequality constraints. Futoshiki is ideal to introduce your child to inequality signs and logical thinking. Futoshiki teaches your child logical thinking and deductive reasoning skills, even at a young age. Futoshiki improves critical thinking and making quick decisions based upon available evidence. Futoshiki is a brain game that helps to train the brain of your child. In addition, Futoshiki demands attention to detail - noticing patterns, spotting opportunities, and finding the right moment to make a move. Futoshiki is not only fun and interesting – it might just help prepare your kids for better success in school and in life. Futoshiki For Kids Mixed Grids - Easy to Hard is a collection of 145 puzzles: 44 easy Futoshiki puzzles, going from 4x4 to 9x9 40 medium Futoshiki puzzles, going from 4x4 to 9x9 40 hard Futoshiki puzzles, going from 4x4 to 9x9 21 extra logic puzzles The goal of Futoshiki is to place one number in each empty cell, so that each column and row contains each number exactly once. Some numbers may be given at the start. In addition, inequality constraints are specified between some of the squares, such that the number must be higher or lower than its neighbor. These constraints must be honored as the grid is filled out. I guarantee that every logic puzzle in this Futoshiki book has been carefully checked to ensure that each puzzle has only 1 solution. Futoshiki is also known as Hutoshiki and Unequal.

Download or read book Nurikabe Mixed Grids Easy to Hard Volume 7 276 Logic Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2016-09-24 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 different sizes of Nurikabe. You get the perfect mix of different sizes of Nurikabe to keep you entertained for weeks. After solving all the puzzles in this book, you will be a Nurikabe Pro. You start with easy Nurikabe puzzles, which keep getting bigger and bigger and you gradually build your way up to extremely difficult Nurikabe puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Nurikabe Mixed Grids - Easy to Hard is a collection of 276 puzzles: 24 easy Nurikabe puzzles per grid size (10x10, 12x12, 14x14), totaling 72 easy puzzles 24 medium Nurikabe puzzles per grid size (10x10, 12x12, 14x14), totaling 72 medium puzzles 24 hard Nurikabe puzzles per grid size (10x10, 12x12, 14x14), totaling 72 hard puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this Nurikabe 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. Nurikabe is also known as Cell Structure, Islands in the Stream.

Download or read book Binary Puzzles For Kids Mixed Grids Easy to Hard Volume 1 145 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-11-14 with total page 98 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. Binary Puzzles are fun and addicting logic puzzle games. The goal seems to be very simple, fill in the grid with the numbers 0 and 1. However, do not be fooled by its simplicity, Binary Puzzles are really challenging logic puzzles and are excellent brain games. This book contains small Binary Puzzles, which are ideal for children. Binary Puzzles teach your child logical thinking and deductive reasoning skills, even at a young age. Binary Puzzles improve critical thinking and making quick decisions based upon available evidence. Binary Puzzles are a brain game that helps to train the brain of your child. In addition, Binary Puzzles demand attention to detail - noticing patterns, spotting opportunities, and finding the right moment to make a move. Binary Puzzles are not only fun and interesting – they might just help prepare your kids for better success in school and in life. Binary Puzzles For Kids Mixed Grids- Easy to Hard is a collection of 145 puzzles: 44 easy Binary Puzzles, going from 4x4 to 9x9 40 medium Binary Puzzles, going from 4x4 to 9x9 40 hard Binary Puzzles, going from 4x4 to 9x9 21 extra logic puzzles The goal of a Binary Puzzle is to fill in the grid with the numbers 0 and 1 according to the following rules: There are as many ones as zeros in every row and every column (or one more for odd sized grids). No more than two of the same number can be next to or under each other. Each row is unique, and each column is unique. I guarantee that every logic puzzle in this Binary Puzzles book has been carefully checked to ensure that each puzzle has only 1 solution. Binary Puzzles are also known as Takuzu, Tohu wa Vohu and Binero.

Download or read book Futoshiki Mixed Grids Easy to Hard Volume 1 276 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-17 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 Futoshiki. You will experience Futoshiki 7x7, Futoshiki 8x8 and Futoshiki 9x9. You get the perfect mix of different sizes of Futoshiki to keep you entertained for weeks. After solving all the puzzles in this book, you will be a Futoshiki Pro. You start with easy Futoshiki puzzles, which keep getting bigger and bigger and you gradually build your way up to extremely hard Futoshiki puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Futoshiki Mixed Grids - Easy to Hard is a collection of 276 puzzles: 24 easy Futoshiki puzzles per grid size, totaling 72 easy puzzles 24 medium Futoshiki puzzles per grid size, totaling 72 medium puzzles 24 hard Futoshiki puzzles per grid size, totaling 72 hard puzzles 60 extra logic puzzles The goal of Futoshiki is to place one number in each empty cell, so that each column and row contains each number exactly once. Some numbers may be given at the start. In addition, inequality constraints are specified between some of the squares, such that the number must be higher or lower than its neighbor. These constraints must be honored as the grid is filled out. I guarantee that every logic puzzle in this Futoshiki 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. Futoshiki is also known as Hutoshiki and Unequal.

Download or read book Killer Sudoku 9x9 Medium Volume 3 270 Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-10-04 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. Killer Sudoku is a fun and addicting logic puzzle game that combines Sudoku with an addition math game. Killer Sudoku is a fun way for kids and adults to practice addition facts. This book is ideal if you already know how to solve Killer Sudoku puzzles but find our hard Killer Sudoku puzzles too difficult. Once you pick up this book, you won't be able to put it back down. You have been warned! The goal of Killer 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 sum of all numbers in a cage (indicated by the dashed lines) must match the small number printed in its corner. No number can be repeated within a cage. Killer Sudoku 9x9 - Medium is a collection of 270 puzzles: 216 medium Killer Sudoku 9x9 puzzles 54 extra logic puzzles I guarantee that every logic puzzle in this Killer 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. Killer Sudoku is also known as Sums Sudoku, Sumdoku, Sum Doku, Addoku, Killer Su Doku, Samunamupure, Kikagaku Nampure, Samu Nanpure, Sums Number Place.

Download or read book Hidoku Mixed Grids Deluxe Easy to Hard Volume 5 255 Logic Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2014-12-21 with total page 292 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 Hidoku. You will experience Hidoku 20x20, Hidoku 25x25 and Hidoku 30x30. You get the perfect mix of different sizes of Hidoku to keep you entertained for weeks. After solving all the puzzles in this book, you will be a Hidoku Pro. You start with easy Hidoku puzzles, which keep getting bigger and bigger and you gradually build your way up to extremely difficult and colossal Hidoku puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 Hidoku puzzle per page, with lots of white space for scribbling. Hidoku Mixed Grids Deluxe - Easy to Hard is a collection of 255 puzzles: 24 easy Hidoku puzzles per grid size, totaling 72 easy puzzles 24 medium Hidoku puzzles per grid size, totaling 72 medium puzzles 24 hard Hidoku puzzles per grid size, totaling 72 hard puzzles 39 extra logic puzzles The goal of Hidoku is to fill the grid with consecutive numbers that connect horizontally, vertically, or diagonally. In every Hidoku puzzle, the smallest and the highest number are presented in the grid. I guarantee that every logic puzzle in this Hidoku 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. Hidoku is also known as Number Snake.