Hitori 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
Painted-out (black) cells cannot be connected, and the other (white) cells must be connected in a single group.
An online tutorial is on: http://www.nikoli.co.jp/en/puzzles/hitori/
For free puzzles see the links to the right -->