Author: Andrey Bogdanov
Place the given pentominoes into the grid. Pentominoes may be rotated and reflected. Pentominoes can not share an edge, but they can touch diagonally - every node where two pentominoes share a node is marked.
Grid control: Click the mouse button at the selected cell to change the color of the cell. You can also click on the given elements to mark them out. More details about grid control are at the help page.