Akari
"Akari" was developed by Nikoli in 2001. Akari has very simple rules, but guides you a logical complex world.Rules
1. Place light bulbs (circles) according to the following rules.
2. Light bulbs may be placed in any of the white squares, the number in the square
shows how many light bulbs are next to it, vertically and horizontally.
3. Each light bulb illuminates from bulb to black square or outer frame
in its row and column.
4. Every white square must be illuminated and a light bulb can not illuminate
another light bulb.