Pentomino Tapa (512)

Shade some cells to create an orthogonally interconnected wall of shaded numbers, so that the wall is made up exclusively of non-overlapping identical pentominoes. Numbers in a cell indicate the lengths of shaded cell blocks in its neighbouring cells. If there is more than one number in a cell there must be at least one unshaded cell between each two shaded blocks. Shaded cells cannot form a 2x2 square or larger. There are no wall segments in the cells containing numbers.

Reference: WPC 2016 (65)