Puzzle Instructions

Video Tutorial

Hitori rules

Following the footsteps of Sudoku and Kakuro, Hitori are yet another type of easy to learn addictive logic puzzle which was invented in Japan. Using pure logic and requiring no math to solve, these fascinating puzzles offer endless fun and intellectual entertainment to puzzle fans of all skills and ages.

Hitori is a number-elimination puzzle. Unlike Sudoku and Kakuro, Hitori puzzles start with all the numbers in the grid and your task is to eliminate some of them according to the rules.

Hitori puzzles come in many sizes and range from very easy to extremely difficult taking anything from five minutes to several hours to solve. However, make one mistake and you’ll find yourself stuck later on as you get closer to the solution...

If you like Sudoku, Kakuro and other logic puzzles, you will love Conceptis Hitori as well!

In addition to the descriptions below a tutorial page is also provided.

Classic Hitori

Each puzzle consists of a square grid with numbers appearing in all squares. The object is to shade squares so that the numbers don’t appear in a row or column more than once. In addition, shaded squares must not touch each other vertically or horizontally while all un-shaded squares must create a single continuous area.

Puzzle Instructions

Battleships rules

Battleship puzzles, which became popular since 1992, are a single player version of the game many of us used to enjoy as children. Using pure logic and requiring no math to solve, these addictive puzzles offer endless fun and intellectual entertainment to puzzle fans of all skills and ages.

A typical Battleship puzzle consists of a 10x10 grid containing a hidden fleet of ten known ships. The only information is numbers telling how many ship segments are in each row and column, and some given ship segments in various places in the grid. The object is to discover where all ten ships are located in the grid.

Conceptis Battleships are easy to learn logic puzzles that come in several grid sizes and offer endless solving variations, ranging from very easy to extremely difficult and taking anything from five minutes to several hours to solve.

If you like Sudoku, Kakuro and other logic puzzles, you will love Conceptis Battleships as well!

In addition to the descriptions below a tutorial page is also provided.

Classic Battleships

Each Battleship puzzle represents an ocean with a hidden fleet of ships, which may be oriented horizontally or vertically within the grid such that no ship touches another, not even diagonally. The numbers on the right and on the bottom of the grid show how many squares in the corresponding row and column are occupied by ship segments. Occasionally some squares may contain given ship or water segments to help start the puzzle. The object is to discover where all ships are located.

Classic Battleship puzzles come in various sizes, with different fleets for each size. For example, the fleet of a Classic Battleship 10x10 puzzle consists of one battleship, two cruisers, three destroyers and four submarines.

Submarines consist of a single round segment, destroyers have two end segments, cruisers have two end segments and a middle segment, and the battleship is constructed of two end segments and two middle segments. Any remaining squares in the grid contain water segments, which are shown as a symbol of water or as an “X”.

Puzzle Instructions
Video Tutorial

Kakuro rules

Kakuro are easy to learn yet highly addictive language-independent logic puzzles now following the footsteps of the worldwide Sudoku success. Requiring just pure logic and simple add/subtract calculations, these numerical-crossword puzzles will carry you into a fascinating world of number combinations you never imagined could exist.

Best defined as number crosswords, Kakuro puzzles come in endless variations, are available in almost any grid size and range from very easy to extremely difficult taking anything from ten minutes to several hours to solve. Make one mistake and you’ll find yourself stuck later on as you get closer to the solution...

If you like Sudoku and other logic puzzles, you will love Conceptis Kakuro as well!

In addition to the descriptions below a tutorial page is also provided.

Classic Kakuro

Each puzzle consists of a blank grid with sum-clues in various places. The object is to fill all empty squares using numbers 1 to 9 so the sum of each horizontal block equals the clue on its left, and the sum of each vertical block equals the clue on its top. In addition, no number may be used in the same block more than once.

Kakuro Variants

Kakuro variants are solved using the same rules as Classic Kakuro. The only difference is the external shape of the puzzle grids. Fill all empty squares using numbers 1 to 9 so the sum of each horizontal block equals the clue on its left, and the sum of each vertical block equals the clue on its top. In addition, no number may be used in the same block more than once.

Kakuro Magic Blocks

The secret to solving Kakuro puzzles is learning how to use magic blocks – those special situations where only a single combination of numbers can fit into a block of a given length. For example, if 6 is the sum-clue of a block of three squares then the block must consist of the numbers 1+2+3 but not necessarily in this order.

When spotting a magic block, the Magic Blocks table can be helpful to identify which unique numbers must be used in that block. The only thing left is to find out in which order the numbers should be organized.

This Kakuro Magic Blocks table shows all the magic block possibilities which may occur in Kakuro puzzles.