Bøger af John Collins

Diagonal Sudoku also called Sudoku X.The puzzle is a 9x9 grid made up of 3x3 subgrids (called "regions").Some cells already contain numbers, known as "givens".The goal is to fill in the empty cells, one number in each, so that each column, row, region and diagonal contains the numbers 1 through 9 exactly once.Each number in the solution therefore occurs only once in each of three "directions", hence the "single numbers" implied by the puzzle's name.

Binary puzzle (also known as "Binairo", "Takuzu", "Tohu wa Vohu") is a logic puzzle that you can solve by using only zeros and ones. The rectangular or square grid should fill the numbers in accordance with the following rules: - Each row and each column contain the same number of digits "1" as digits "0" (or one more for odd sized grids). - The same number can only be in no more than two cells in a row. - Each line must be unique, and each column must be unique. In the book you will find a description and examples of solutions for all puzzles.The book is for those who like logic and math problems. Decide, developing and improving.

Hidoku (from Hebrew: "my puzzle") is a logical puzzle.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. There are more numbers on the board to help to direct the player how to start the solution and to ensure that Hidoku has only a single solution.Hidoku puzzles are similar to Numbrix. The most important difference is that diagonal moves are allowed.

Sudoku X also called Diagonal Sudoku.The puzzle is a 6x6 grid made up of 3x2 subgrids (called "regions").Some cells already contain numbers, known as "givens".The goal is to fill in the empty cells, one number in each, so that each column, row, region and diagonal contains the numbers 1 through 6 exactly once.Each number in the solution therefore occurs only once in each of three "directions", hence the "single numbers" implied by the puzzle's name.

Straights is a logic puzzle.It is a grid, partially divided by black cells into compartments.Each compartment, vertically or horizontally, must contain a straight - a set of consecutive numbers, but in any order (for example: 2-1-3-4).The aim is to fill all white cells with the numbers from 1 to N (where N is the size of the grid).No single number can repeat in any row or column.Clues in black cells remove that number as an option in that row and column, and are not part of any straight.

Killer Sudoku (also called Sums Sudoku, Sums Number Place, Samunamupure, Kikagaku Nampure) is a puzzle that combines elements of Sudoku and Kakuro.Despite the name, the simpler killer sudokus can be easier to solve than regular sudokus, depending on the solver's skill at mental arithmetic, the hardest ones, however, can take hours to crack.In Killer Sudoku, sub-regions have specified sums, and no number can be repeated within a region.

Killer Sudoku (also called Sums Sudoku, Sums Number Place, Samunamupure, Kikagaku Nampure) is a puzzle that combines elements of Sudoku and Kakuro.Despite the name, the simpler killer sudokus can be easier to solve than regular sudokus, depending on the solver's skill at mental arithmetic, the hardest ones, however, can take hours to crack.In Killer Sudoku, sub-regions have specified sums, and no number can be repeated within a region.

Sudoku Jigsaw (also known as "Irregular", "Nonomino" or "Geometric Sudoku") is a logic-based, combinatorial number-placement puzzle.Jigsaw Sudokus are very similar to regular Sudoku puzzles. Regular 12x12 Sudoku that row and column rules apply, but instead of a 6x2 grid they are nime Jigsaw shapes.Each row, column and jigsaw shape contains all of the digits 1 through 12. In all other respects the puzzle works in the same way, but this change in the region shapes introduces new twists into the logic required to solve the puzzle - and often makes it much harder for you to find the next move as a result!Every Jigsaw Sudoku puzzle only ever has one possible solution, and it can always be reached via reasonable logical deduction. In other words, guessing is never required.

Binary puzzle (also known as "Binairo", "Takuzu", "Tohu wa Vohu") is a logic puzzle that you can solve by using only zeros and ones. The rectangular or square grid should fill the numbers in accordance with the following rules: - Each row and each column contain the same number of digits "1" as digits "0" (or one more for odd sized grids). - The same number can only be in no more than two cells in a row. - Each line must be unique, and each column must be unique. In the book you will find a description and examples of solutions for all puzzles.The book is for those who like logic and math problems. Decide, developing and improving.

Binary puzzle (also known as "Binairo", "Takuzu", "Tohu wa Vohu") is a logic puzzle that you can solve by using only zeros and ones. The rectangular or square grid should fill the numbers in accordance with the following rules: - Each row and each column contain the same number of digits "1" as digits "0" (or one more for odd sized grids). - The same number can only be in no more than two cells in a row. - Each line must be unique, and each column must be unique. In the book you will find a description and examples of solutions for all puzzles.The book is for those who like logic and math problems. Decide, developing and improving.

Suguru (also known as "Number Blocks") is a logic puzzle that has simple rules, but which provides sufficient challenges to satisfy the most enthusiastic solvers!The task consists of a rectangular or square grid divided into regions.Each region must be filled with each of the digits from 1 to the number of cells in the region.Cells with the same digits must not be orthogonally or diagonally adjacent.Even though the rules are simple, you will need all your skills to solve it.

Straights is a logic puzzle.It is a grid, partially divided by black cells into compartments.Each compartment, vertically or horizontally, must contain a straight - a set of consecutive numbers, but in any order (for example: 2-1-3-4).The aim is to fill all white cells with the numbers from 1 to N (where N is the size of the grid).No single number can repeat in any row or column.Clues in black cells remove that number as an option in that row and column, and are not part of any straight.

Binary puzzle (also known as "Binairo", "Takuzu", "Tohu wa Vohu") is a logic puzzle that you can solve by using only zeros and ones. The rectangular or square grid should fill the numbers in accordance with the following rules: - Each row and each column contain the same number of digits "1" as digits "0" (or one more for odd sized grids). - The same number can only be in no more than two cells in a row. - Each line must be unique, and each column must be unique. In the book you will find a description and examples of solutions for all puzzles.The book is for those who like logic and math problems. Decide, developing and improving.

Numbricks - kind of logic puzzle. It is a rectangular grid in which some cells are numbers. Required to fill the empty cells so that all the numbers have been connected in series horizontally or vertically. Moving diagonally is not allowed.

Straights is a logic puzzle.It is a grid, partially divided by black cells into compartments.Each compartment, vertically or horizontally, must contain a straight - a set of consecutive numbers, but in any order (for example: 2-1-3-4).The aim is to fill all white cells with the numbers from 1 to N (where N is the size of the grid).No single number can repeat in any row or column.Clues in black cells remove that number as an option in that row and column, and are not part of any straight.

Hidoku (from Hebrew: "my puzzle") is a logical puzzle.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. There are more numbers on the board to help to direct the player how to start the solution and to ensure that Hidoku has only a single solution.Hidoku puzzles are similar to Numbrix. The most important difference is that diagonal moves are allowed.

Killer Sudoku (also called Sums Sudoku, Sums Number Place, Samunamupure, Kikagaku Nampure) is a puzzle that combines elements of Sudoku and Kakuro.Despite the name, the simpler killer sudokus can be easier to solve than regular sudokus, depending on the solver's skill at mental arithmetic, the hardest ones, however, can take hours to crack.In Killer Sudoku, sub-regions have specified sums, and no number can be repeated within a region.

Binary puzzle (also known as "Binairo", "Takuzu", "Tohu wa Vohu") is a logic puzzle that you can solve by using only zeros and ones. The rectangular or square grid should fill the numbers in accordance with the following rules: - Each row and each column contain the same number of digits "1" as digits "0" (or one more for odd sized grids). - The same number can only be in no more than two cells in a row. - Each line must be unique, and each column must be unique. In the book you will find a description and examples of solutions for all puzzles.The book is for those who like logic and math problems. Decide, developing and improving.

Suguru (also known as "Number Blocks") is a logic puzzle that has simple rules, but which provides sufficient challenges to satisfy the most enthusiastic solvers!The task consists of a rectangular or square grid divided into regions.Each region must be filled with each of the digits from 1 to the number of cells in the region.Cells with the same digits must not be orthogonally or diagonally adjacent.Even though the rules are simple, you will need all your skills to solve it.

Binary puzzle (also known as "Binairo", "Takuzu", "Tohu wa Vohu") is a logic puzzle that you can solve by using only zeros and ones. The rectangular or square grid should fill the numbers in accordance with the following rules: - Each row and each column contain the same number of digits "1" as digits "0" (or one more for odd sized grids). - The same number can only be in no more than two cells in a row. - Each line must be unique, and each column must be unique. In the book you will find a description and examples of solutions for all puzzles.The book is for those who like logic and math problems. Decide, developing and improving.

Suguru (also known as "Number Blocks") is a logic puzzle that has simple rules, but which provides sufficient challenges to satisfy the most enthusiastic solvers!The task consists of a rectangular or square grid divided into regions.Each region must be filled with each of the digits from 1 to the number of cells in the region.Cells with the same digits must not be orthogonally or diagonally adjacent.Even though the rules are simple, you will need all your skills to solve it.

Diagonal Sudoku also called Sudoku X.The puzzle is a 12x12 grid made up of 4x3 subgrids (called "regions").Some cells already contain numbers, known as "givens".The goal is to fill in the empty cells, one number in each, so that each column, row, region and diagonal contains the numbers 1 through 12 exactly once.Each number in the solution therefore occurs only once in each of three "directions", hence the "single numbers" implied by the puzzle's name.

Suguru (also known as "Number Blocks") is a logic puzzle that has simple rules, but which provides sufficient challenges to satisfy the most enthusiastic solvers!The task consists of a rectangular or square grid divided into regions.Each region must be filled with each of the digits from 1 to the number of cells in the region.Cells with the same digits must not be orthogonally or diagonally adjacent.Even though the rules are simple, you will need all your skills to solve it.

Sudoku Jigsaw (also known as "Irregular", "Nonomino" or "Geometric Sudoku") is a logic-based, combinatorial number-placement puzzle.Jigsaw Sudokus are very similar to regular Sudoku puzzles. Regular 10x10 Sudoku that row and column rules apply, but instead of a 5x2 grid they are nime Jigsaw shapes.Each row, column and jigsaw shape contains all of the digits 1 through 10. In all other respects the puzzle works in the same way, but this change in the region shapes introduces new twists into the logic required to solve the puzzle - and often makes it much harder for you to find the next move as a result!Every Jigsaw Sudoku puzzle only ever has one possible solution, and it can always be reached via reasonable logical deduction. In other words, guessing is never required.

Numbricks - kind of logic puzzle. It is a rectangular grid in which some cells are numbers. Required to fill the empty cells so that all the numbers have been connected in series horizontally or vertically. Moving diagonally is not allowed.

Straights is a logic puzzle.It is a grid, partially divided by black cells into compartments.Each compartment, vertically or horizontally, must contain a straight - a set of consecutive numbers, but in any order (for example: 2-1-3-4).The aim is to fill all white cells with the numbers from 1 to N (where N is the size of the grid).No single number can repeat in any row or column.Clues in black cells remove that number as an option in that row and column, and are not part of any straight.

Hidoku (from Hebrew: "my puzzle") is a logical puzzle.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. There are more numbers on the board to help to direct the player how to start the solution and to ensure that Hidoku has only a single solution.Hidoku puzzles are similar to Numbrix. The most important difference is that diagonal moves are allowed.

Straights is a logic puzzle.It is a grid, partially divided by black cells into compartments.Each compartment, vertically or horizontally, must contain a straight - a set of consecutive numbers, but in any order (for example: 2-1-3-4).The aim is to fill all white cells with the numbers from 1 to N (where N is the size of the grid).No single number can repeat in any row or column.Clues in black cells remove that number as an option in that row and column, and are not part of any straight.

Suguru (also known as "Number Blocks") is a logic puzzle that has simple rules, but which provides sufficient challenges to satisfy the most enthusiastic solvers!The task consists of a rectangular or square grid divided into regions.Each region must be filled with each of the digits from 1 to the number of cells in the region.Cells with the same digits must not be orthogonally or diagonally adjacent.Even though the rules are simple, you will need all your skills to solve it.

Hidoku (from Hebrew: "my puzzle") is a logical puzzle.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. There are more numbers on the board to help to direct the player how to start the solution and to ensure that Hidoku has only a single solution.Hidoku puzzles are similar to Numbrix. The most important difference is that diagonal moves are allowed.