Rules: Shade some empty cells black so that the grid is divided into white areas, each containing exactly one number and with the same area as that number. White areas may only touch diagonally. All shaded cells must be connected orthogonally with each other (by an edge), but no 2x2 square of cells can be entirely shaded black. Some shapes are given outside of the grid. Each shape must represent exactly one white area in the grid, and each white area is represented by exactly one shape outside the grid. Shapes can be rotated/reflected in the grid.
The answer is here: Shape Nurikabe Answer