Usowan

Usowan Puzzle Rules:

A grid is divided into rectangular and square regions. Some cells contain numbers. Fill in some cells with black according to these rules:

• Numbered cells remain white.

• A number indicates the number of black cells around it, but one number per region is wrong.

• Black cells cannot touch horizontally or vertically.

• All white cells must be connected.

Usowan Puzzle:

Usowan Puzzle Solution: