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Masyu is a type of logic. The purpose of its creation was to present a puzzle that uses no numbers or letters and yet retains depth and aesthetics. Masyu is played on a rectangular grid of squares, some of which contain circles, each circle is either "white" (empty) or "black" (filled). The goal is to draw a single continuous non-intersecting loop that properly 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. The two varieties of circle have differing requirements for how the loop must pass through them: - 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.

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. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Experts 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.

Masyu is a type of logic. The purpose of its creation was to present a puzzle that uses no numbers or letters and yet retains depth and aesthetics. Masyu is played on a rectangular grid of squares, some of which contain circles, each circle is either "white" (empty) or "black" (filled). The goal is to draw a single continuous non-intersecting loop that properly 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. The two varieties of circle have differing requirements for how the loop must pass through them: - 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.

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. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Experts 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.

Tents Island (also known as "Airando") is a logic puzzle invented by Naoki Inaba (Japan). It consists of a grid, with numbers in some cells. The aim is to blacken some cells of a grid according to the following rules: - The white cells form a single island. Each numbered cell must be a part of this island. - The numbers indicate how many unnumbered white cells can be reached from that cell by moving horizontally or vertically. Numbered cells block access.

Samurai Sudoku - kind of Sudoku puzzles. The playing field consists of five squares measuring 9 x 9. The numbers 1 to 9 must be placed correctly in all five squares.Place 1 to 9 once each into every row.Place 1 to 9 once each into every column.Place 1 to 9 once each into every bold-lined 3x3 box. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 1 Puzzles per Page- Ideal for Beginners 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.

Tents Island (also known as "Airando") is a logic puzzle invented by Naoki Inaba (Japan). It consists of a grid, with numbers in some cells. The aim is to blacken some cells of a grid according to the following rules: - The white cells form a single island. Each numbered cell must be a part of this island. - The numbers indicate how many unnumbered white cells can be reached from that cell by moving horizontally or vertically. Numbered cells block access.

Patchwork (also known as "Tatami") consists of a square grid divided into regions ("rooms").Each room must be filled with each of the digits from 1 to the number of cells in the room.Every row and every column must contain the same amount of each digit.Same digits must not be orthogonally adjacent. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Beginners 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.

Hashi (also known as "Hashiwokakero" from Japanese "Hashi o kakero"; literally "build bridges"; "Bridges", "Chopsticks", or "Ai-Ki-Ai") is a type of logic puzzle. It is played on a rectangular grid with no standard size, although the grid itself is not usually drawn. Some cells start out with (usually encircled) numbers from 1 to 8 inclusive; these are the islands. The rest of the cells are empty.The goal is to connect all of the islands into a single connected group by drawing a series of bridges between the islands. The bridges must follow certain criteria: - They must begin and end at distinct islands, travelling a straightline in between.- They must not cross any other bridges or islands.- They may only run orthogonally.- At most two bridges connect a pair of islands.- The number of bridges connected to each island must match thenumber on that island. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for both Beginners and Experts 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.

Sudoku (also known as "Number Place") is a placement puzzle.The puzzle is most frequently a 8 x 8 grid made up of 4 x 2 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, and region contains the numbers 1 through 8 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. In Consecutive Sudoku ("1-away Disallowed Number Place"), all the places where orthogonally adjacent cells are consecutive numbers have been specially marked. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Experts 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.

Knossos is a logic puzzle ("Knossos" is a palace on Crete; this palace is connected with ancient legends, such as the myth of the Labyrinth with the Minotaur). It is played on a rectangular grid. Some of the cells in the grid are numbered. The goal is to divide the grid into regions ("rooms") such that each region contains exactly one number, and that number represents the border's length of the rectangle.

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. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Beginners 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.

Patchwork (also known as "Tatami") consists of a square grid divided into regions ("rooms").Each room must be filled with each of the digits from 1 to the number of cells in the room.Every row and every column must contain the same amount of each digit.Same digits must not be orthogonally adjacent. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Experts 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.

Tents Island (also known as "Airando") is a logic puzzle invented by Naoki Inaba (Japan). It consists of a grid, with numbers in some cells. The aim is to blacken some cells of a grid according to the following rules: - The white cells form a single island. Each numbered cell must be a part of this island. - The numbers indicate how many unnumbered white cells can be reached from that cell by moving horizontally or vertically. Numbered cells block access.

Easy as ABC (also known as "ABC End View", "Last Man Standing") is a square grid, whose cells are to be filled by a range of letters (e.g. A through H), with each different letter occurring exactly once in each row and column, and the other cells remaining empty.The letters outside the grid show which letter will come across first from that direction. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Experts 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.

Tents ("Tents and Trees") is a logic puzzle. The task is a grid of squares, some of them contain trees. 1. Tents can only be placed onto areas with grass, not areas with trees. 2. Each tents must be next to its own tree. 3. Tents must not touch on either the sides or the corners of another tent. 4. Numbers at the ends of rows and columns show how many tents each must contain.

Numbricks is a type of logic puzzle. It is played on a rectangular grid of squares. Some of the cells have numbers in them. The object is to fill in the missing numbers, in sequential order, going horizontally and vertically only. Diagonal paths are not allowed.Numbricks puzzles are similar to Hidato. The most important difference that it is only possible to move 1 node left, right, up, or down. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Beginners 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.

Tents Island (also known as "Airando") is a logic puzzle invented by Naoki Inaba (Japan). It consists of a grid, with numbers in some cells. The aim is to blacken some cells of a grid according to the following rules: - The white cells form a single island. Each numbered cell must be a part of this island. - The numbers indicate how many unnumbered white cells can be reached from that cell by moving horizontally or vertically. Numbered cells block access.

Sudoku Greater Than (also called "Compdoku") is the variation of the original Sudoku. In addition, greater than or less than signs (">" or "

Sudoku (also known as "Number Place") is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 subgrids that compose the grid (also called "boxes", "blocks", or "regions") contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single solution. Outside Sudoku is a variation of the standard sudoku. Some digits are given outside the grid. These digits must appear in the first three cells in the corresponding direction.

Patchwork (also known as "Tatami") consists of a square grid divided into regions ("rooms").Each room must be filled with each of the digits from 1 to the number of cells in the room.Every row and every column must contain the same amount of each digit.Same digits must not be orthogonally adjacent. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Beginners 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.

Kojun is a logic puzzle invented.A rectangular or square grid is divided into regions.Some cells contain numbers.Each region must be filled with each of the digits from 1 to the number of cells in the region.When two numbers are orthogonally adjacent, the numbers must be different.The upper number of two vertically adjacent numbers in the same region must be greater than the lower number. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Experts 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.

Samurai Sudoku Jigsaw puzzle consists of 5 overlapping Jigsaw Sudoku grids. Place the digits 1 to 9 into every row and column of each of the regular 9x9 Sudoku grids, as well as each of the bold-lined jigsaw pieces. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 1 Puzzles per Page- Ideal for Beginners 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.

Hashi (also known as "Hashiwokakero" from Japanese "Hashi o kakero"; literally "build bridges"; "Bridges", "Chopsticks", or "Ai-Ki-Ai") is a type of logic puzzle. It is played on a rectangular grid with no standard size, although the grid itself is not usually drawn. Some cells start out with (usually encircled) numbers from 1 to 8 inclusive; these are the islands. The rest of the cells are empty.The goal is to connect all of the islands into a single connected group by drawing a series of bridges between the islands. The bridges must follow certain criteria: - They must begin and end at distinct islands, travelling a straightline in between.- They must not cross any other bridges or islands.- They may only run orthogonally.- At most two bridges connect a pair of islands.- The number of bridges connected to each island must match thenumber on that island. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for both Beginners and Experts 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.

Easy as ABC (also known as "ABC End View", "Last Man Standing") is a square grid, whose cells are to be filled by a range of letters (e.g. A through H), with each different letter occurring exactly once in each row and column, and the other cells remaining empty.The letters outside the grid show which letter will come across first from that direction. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Beginners 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.

Shakashaka (also known as "Proof of Quilt") is a logic puzzle. The task is to place one of the four isosceles right triangles in some white cells. Each triangle must occupy exactly half of its cell, but may be in one of four orientations. Every contiguous white region must be a rectangle or a square. A number in a black cell indicates how many triangles are adjacent to that cell by sides.

Shikaku (also known as "Divide by Squares", "Divide by Box", "Number Area") is a logic puzzle. It is played on a rectangular grid. Some of the cells in the grid are numbered. The objective is to divide the grid into rectangular and square pieces such that each piece contains exactly one number, and that number represents the area of the rectangle.

Tents Island (also known as "Airando") is a logic puzzle invented by Naoki Inaba (Japan). It consists of a grid, with numbers in some cells. The aim is to blacken some cells of a grid according to the following rules: - The white cells form a single island. Each numbered cell must be a part of this island. - The numbers indicate how many unnumbered white cells can be reached from that cell by moving horizontally or vertically. Numbered cells block access.

Patchwork (also known as "Tatami") consists of a square grid divided into regions ("rooms").Each room must be filled with each of the digits from 1 to the number of cells in the room.Every row and every column must contain the same amount of each digit.Same digits must not be orthogonally adjacent. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Experts 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.

Kojun is a logic puzzle invented.A rectangular or square grid is divided into regions.Some cells contain numbers.Each region must be filled with each of the digits from 1 to the number of cells in the region.When two numbers are orthogonally adjacent, the numbers must be different.The upper number of two vertically adjacent numbers in the same region must be greater than the lower number. The puzzle book contain: - 200 Puzzles- Handy 6 x 9 inch Book Layout- 2 Puzzles per Page- Ideal for Beginners 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.