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Pentominous (Star Battle) (1135)
Instruction:
Place stars into some empty cells in the grid, no more than one star per cell. Each row and each column must contain exactly two stars (one star in the example). Cells with stars may not touch each other along an edge or a corner.
Then, divide the grid into pentominoes such that every unstarred cell in the grid is part of exactly one pentomino. Pentominoes of the same shape (rotations and reflections of a pentomino count as the same shape) cannot touch each other along an edge (but they may touch diagonally). Some letters are given in the grid. Each letter must be part of a pentomino with that letter's shape. It is permissible for a pentomino to contain more than one letter. (It is possible for some pentomino shapes to never appear in the grid, or more than once.)