Peintoeria is probably a Nikoli original.
Puzzle and Goal
An unsolved puzzle consists of a rectangular grid divided into regions. Some numbered clues have been provided.
The goal is to color in some of the squares.
The solved grid must satisfy the following conditions:
Blacken entire regions only.
Numbers indicate how many orthogonal neighbors are black.
Each 2x2 area has at least one white cell and at least one black cell.
All black cells form an orthogonally contiguous area.