DISKU

DISKU is a game of logic and deduction. Each DISKU board is a square grid of disks, where each disk has a color and a shape on top. Each row, column, and color contains one, and only one of each shape.

When you start a new DISKU puzzle, most of the shapes will be hidden. You know that each row, column, and color has only one of each shape, so your goal is simple: solve it as fast as you can! Did we mention it's timed?