As the name suggests, this puzzle has two interlocking H-shaped pieces. At first glance they may appear to be exactly the same shape, but in reality there are slight differences. Do you see yourself capable of separating the two pieces? The movements of the pieces are the most tricky, and you have to be careful so that your memory does not play it with you. Designed by the Dutch genius Oskar The motto of this puzzle is Interlacing.