The five squares of the 12 pentominoes have been stretched diagonally into diamonds, or rhombuses (rhombi, to you purists). Since you can stretch them in two directions—along the short and long diagonal—you get 20 shapes in all. Perfect for filling a 10x10 rhombus-shaped tray.

How to play

Move the pieces by dragging them.

Rotate the pieces by clicking them.

Flip the selected pieces by double-clicking them.

Challenges: presented with the numbers 1, 2, and 3 respectively.