HITORI

HITORI

Hitori (Japanese for: Alone or one person) is a type of logic puzzle published by Nikoli.

Another name for this puzzle is  "leave me alone".

Rules: 

1. Each number must not be more than once in each row and column. If there are more, some must be marked as black.
2. No black cell beside each other, only in diagonal
3. The white cells must be continuous

Example :

Solution :