Hitori Puzzle Online (Logical Thinking Brain Game)

Hitori Puzzles Vol 1 contains many Hitori puzzles which one can solve it online. 

One can also solve Daily Hitori puzzle online here along with other similar Logical Puzzles

Checkout Hitori puzzle Tutorial to learn Rules and basic techniques to solve this puzzle.

Rules of Hitori

Black out some of the digits in the grid so that each row and each column contains only different digits. Black cells must not touch horizontally or vertically and all non-black cells must remain interconnected.

Hitori Puzzle Tutorial