Curious Cheetah



Hitori is short for <em>Hitori ni shite kure,</em> ひとりにしてくれ, that is, &ldquo;Leave me alone&rdquo;, possibly in reference to the lack of any duplicated digits in any row or column in the solution.
Hitori was invented by Nikoli and first appeared in 1990.

Puzzle and Goal

An unsolved puzzle consists of a square grid filled entirely with numbers, ranging from 1 to <em>n</em>, where <em>n</em> is the size of the grid.
The goal is to color some of the cells black, leaving the remaining white.
Hitori initial statespacerHitori solution


The solved grid must satisfy the following conditions:

Other Names

Federstrich; Hitori ni shite kure; Singles

Playable Online