Hitori

from Wikipedia, the free encyclopedia
Example of a hitori
Associated solution

Hitori ( Japanese ひ と り に し て く れ Hitori ni shite kure , German 'leave me alone' ) is a mystery from the Japanese publisher Nikoli . It first appeared in Puzzle Communication Nikoli 29 (March 1990). The puzzle is also known as the stroke of a pen .

regulate

Hitori is played on a square grid. All squares contain numbers. The aim is to identify squares with "wrong" numbers and to mark them in color or to highlight them in some other way until the following properties are met:

  • In each row and in each column, each number appears only once without highlighting.
  • The highlighted squares must not adjoin one another on one edge.
  • The remaining white squares must be connected by edges.

Usually the given numbers clearly define the solution.

Solution methods

Logic pel 1.png To solve a Hitori one tries to highlight more and more numbers one by one until one gets a solution that fulfills the above rules.
Logic pel 2.png For example, if the hitori contains a series of three identical numbers, both ends must be highlighted.
Logic pel 3.png A square between two identical numbers must always remain white. If a number is even between three identical numbers, the end that contains only one number must be emphasized.
Logic pel 7.png Due to the fact that highlighted squares must not border horizontally or vertically, the neighbors of a highlighted square are always white. It can therefore also be helpful to mark the fields that must remain white in a different way, e.g. B. by circling the appropriate numbers.
Logic pel 8.png Since the white squares must all be connected, no fields may be marked that prevent this.
Logic pel 6.png Logical considerations can be used to find many other solution strategies that ultimately lead to the solution you are looking for.

Web links

Commons : Hitori  - collection of images, videos and audio files