Irasuto
Background
Irasuto was invented by Inaba Naoki.
Puzzle and Goal
An unsolved puzzle consists of a rectangular grid. Some cells have been colored black; some cells (both black and white) contain a number.
The goal is to color in some of the cells.
Rules
The solved grid must satisfy the following conditions:
Numbers indicate how many total cells can be seen of the number's color in a continuous line in all four directions.
Playable Online