Tatamibari (タタミバリ) brings the elegance of traditional Japanese tatami floor planning into a rigorous Nikoli logic deduction game.

• Clue Shapes: A + symbol can only belong to a square (1x1, 2x2, 3x3). A - symbol must be strictly wider than it is tall. A | symbol must be strictly taller than it is wide.
• Corner Vertices: Whenever two mats meet at a corner, the adjacent space must be bridged by a mat that does NOT have a corner at that same vertex, preventing 4-way cross patterns.
• Isolating Clues: Two clues can never be enclosed in the same rectangle, restricting the maximum dimensions of mats located near neighboring clues.