·Goal: cover the whole floor with rectangles. They may not overlap or leave gaps.
·Every rectangle contains exactly one symbol. The symbol fixes its shape: – is wider than tall, | is taller than wide, and + is a square.
·Four rectangles may never meet at one corner. At every meeting point, at least one edge must continue.
·Play: drag over a rectangle to lay it. Tap an empty cell for a 1×1 mat; tap a placed mat to lift it.
– wide · | tall · + square