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Hitori (from Japanese "Hitori ni shite kure"; literally "let me alone") is played on a grid of squares. At the beginning, each cell contains a number. The goal is to paint out some cells so that there are no duplicate numbers in any row or column, similar to the solved state of a Sudoku puzzle (except with black squares added to the grid). Orthogonal connections are important as well; paintedout (black) cells cannot be connected orthogonally, and the other cells must be connected orthogonally in a single group (i.e. no two black squares can be adjacent to each other, and all un-painted squares must be connected, horizontally or vertically, to create a single shape).

Fillomino (also known as "Polyominous") is a type of logic puzzle. It is played on a rectangular grid of squares. Some cells of the grid start containing numbers, referred to as "givens". The goal is to divide the grid into blocks. The block must contain the number of cells indicated by the number in the cells of the block. The block cannot touch a similarly sized block, horizontally or vertically. Cells without numbers may form blocks necessary to complete the puzzle.

Kropki Sudoku (the Polish word "kropki" means "dots"; also known as "Dots Sudoku") is the variation of the original sudoku. If absolute difference between two digits in neighboring cells equals 1, then they are separated by a white dot. If the digit is a half of digit in the neighboring cell, then they are separated by black dot. The dot between 1 and 2 can be either white or black.

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. The puzzle books series contain: - 500 Master Puzzles- Handy 6 x 9 inch Book Layout- 6 Puzzles per Page- Ideal for Experts The book is for those who like logic and math problems. Decide, developing and improving.

No Four in a Row is played on a grid of irregular shape.Some cells of the grid contain 'X' and 'O'.The task is to fill in the grid so that four consecutive identical symbols never appear in any row, column or diagonal. 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.

No Four in a Row is played on a grid of irregular shape.Some cells of the grid contain 'X' and 'O'.The task is to fill in the grid so that four consecutive identical symbols never appear in any row, column or diagonal. 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.

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. 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.

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. The puzzle books series contain: - 500 Hard Puzzles- Handy 6 x 9 inch Book Layout- 6 Puzzles per Page- Ideal for Experts The book is for those who like logic and math problems. Decide, developing and improving.

Fobidoshi ("Forbidden Four") is a logic puzzle, invented by Naoki Inaba (Japan). It is played on a rectangular or square grid. Some of the cells have circles in them. The aim is to place circles into empty cells; all the circles must form an orthogonally continuous area. A line of connected circles must not contain more than 3 circles.

Hoshi consists of six large triangles; the numbers 1 through 9 must be placed into the triangular cells of each large triangle. Every line (of any length, even uncontinous) contains every digit not more than once.

Fillomino (also known as "Polyominous") is a type of logic puzzle. It is played on a rectangular grid of squares. Some cells of the grid start containing numbers, referred to as "givens". The goal is to divide the grid into blocks. The block must contain the number of cells indicated by the number in the cells of the block. The block cannot touch a similarly sized block, horizontally or vertically. Cells without numbers may form blocks necessary to complete the puzzle.

Fillomino (also known as "Polyominous") is a type of logic puzzle. It is played on a rectangular grid of squares. Some cells of the grid start containing numbers, referred to as "givens". The goal is to divide the grid into blocks. The block must contain the number of cells indicated by the number in the cells of the block. The block cannot touch a similarly sized block, horizontally or vertically. Cells without numbers may form blocks necessary to complete the puzzle.

Minesweeper Battleships (also known as "Battlemines") combines Battleships puzzle with Minesweeper game found on many computers. The aim is to locate the position of the fleet in the grid. The ships do not touch each other, not even diagonally. A cell with a number indicates how many ship pieces are adjacent to it. Ships are not allowed on the numbered cells. 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.

Dominion is a logic puzzle created by Naoki Inaba (Japan). It consists of a grid, with letters in some cells. The aim is to blacken some cells of a grid according to the following rules: - The black cells must form dominoes which can touch each other diagonally. - Cells with letters are always white. - The black cells divide the grid into regions of white cells. - Cells with the same letter belong to the same white region. - White regions without a cell with a letter are not allowed.

Skyscrapers consists of a square grid. The goal is to fill in each cell with numbers from 1 to N, where N is the size of the puzzle's side. No number may appear twice in any row or column. The numbers along the edge of the puzzle indicate the number of buildings which you would see from that direction if there was a series of skyscrapers with heights equal the entries in that row or column. 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.

Fobidoshi ("Forbidden Four") is a logic puzzle, invented by Naoki Inaba (Japan). It is played on a rectangular or square grid. Some of the cells have circles in them. The aim is to place circles into empty cells; all the circles must form an orthogonally continuous area. A line of connected circles must not contain more than 3 circles.

Fillomino (also known as "Polyominous") is a type of logic puzzle. It is played on a rectangular grid of squares. Some cells of the grid start containing numbers, referred to as "givens". The goal is to divide the grid into blocks. The block must contain the number of cells indicated by the number in the cells of the block. The block cannot touch a similarly sized block, horizontally or vertically. Cells without numbers may form blocks necessary to complete the puzzle.

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. Twodoku (also known as "Sensei Sudoku", "DoubleDoku") - 2 sudoku puzzles that overlap each other. All grids must solved according to sudoku rules.

No Four in a Row is played on a grid of irregular shape.Some cells of the grid contain 'X' and 'O'.The task is to fill in the grid so that four consecutive identical symbols never appear in any row, column or diagonal. 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.

Sudoku (also known as "Number Place") is a placement puzzle.The puzzle is most frequently a 9 x 9 grid made up of 3 x 3 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 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. Frame Sudoku (also known "Outside Sum Sudoku") consists of an empty grid. Numbers in the outside frame equal the sum of the first three numbers in the corresponding row or column in the given 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.

Skyscrapers consists of a square grid. The goal is to fill in each cell with numbers from 1 to N, where N is the size of the puzzle's side. No number may appear twice in any row or column. The numbers along the edge of the puzzle indicate the number of buildings which you would see from that direction if there was a series of skyscrapers with heights equal the entries in that row or column. 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.

Fobidoshi ("Forbidden Four") is a logic puzzle, invented by Naoki Inaba (Japan). It is played on a rectangular or square grid. Some of the cells have circles in them. The aim is to place circles into empty cells; all the circles must form an orthogonally continuous area. A line of connected circles must not contain more than 3 circles.

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. 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.

Fillomino (also known as "Polyominous") is a type of logic puzzle. It is played on a rectangular grid of squares. Some cells of the grid start containing numbers, referred to as "givens". The goal is to divide the grid into blocks. The block must contain the number of cells indicated by the number in the cells of the block. The block cannot touch a similarly sized block, horizontally or vertically. Cells without numbers may form blocks necessary to complete the puzzle.

Shakashaka (also known as "Proof of Quilt") is a logic puzzle, invented by Nikoli. 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.

In Killer Sudoku, sub-regions have specified sums, and no number can be repeated within a region. This variant also called "Sums Sudoku", "Sums Number Place", "Samunamupure", "Kikagaku Nampure".Killer Sudoku 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. Regular 9x9 Killer Sudoku that row and column rules apply, main diagonals also contain the digits 1 through 9. 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.

Fillomino (also known as "Polyominous") is a type of logic puzzle. It is played on a rectangular grid of squares. Some cells of the grid start containing numbers, referred to as "givens". The goal is to divide the grid into blocks. The block must contain the number of cells indicated by the number in the cells of the block. The block cannot touch a similarly sized block, horizontally or vertically. Cells without numbers may form blocks necessary to complete the puzzle.

Hitori (from Japanese "Hitori ni shite kure"; literally "let me alone") is played on a grid of squares. At the beginning, each cell contains a number. The goal is to paint out some cells so that there are no duplicate numbers in any row or column, similar to the solved state of a Sudoku puzzle (except with black squares added to the grid). Orthogonal connections are important as well; paintedout (black) cells cannot be connected orthogonally, and the other cells must be connected orthogonally in a single group (i.e. no two black squares can be adjacent to each other, and all un-painted squares must be connected, horizontally or vertically, to create a single shape).

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 books series contain: - 125 Easy Puzzles- 125 Normal Puzzles- 125 Hard Puzzles- 125 Master Puzzles- Handy 6 x 9 inch Book Layout- 6 Puzzles per Page- Ideal for both Beginners and Experts. The book is for those who like logic and math problems. Decide, developing and improving.

Corral (also known as "Bag", "Cave") is a logic puzzle.The aim is to draw a single closed loop along the grid lines that does not intersect itself.The loop goes around all numbers.The numbers in the grid indicate how many cells inside the loop can be seen horizontally and vertically from that cell, including the cell itself.Question marks can be used instead of clue numbers.Each question mark can represent any nonzero integer. 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.