Blokus (Given Set, Polygraph) (1245)

Shade some cells so that the shaded cells form the shapes in the given set (with rotations and reflections allowed). Shapes cannot touch along edges, but can touch at corners. If a corner is marked with a black dot, then two shapes touch at that corner. If a corner is not marked with a black dot, then two shapes do not touch at that corner.
A cell number inside a shape indicates how many of the edges of that cell are part of the shape's edge. A cell number not inside any shape indicates how many of the edges of that cell are not part of any shape's edge.

Reference: WPF (1)