DEVIL

• The early 20th century witnessed a puzzle boom, which gave birth to an absurdly simple looking puzzle known as the "Devil's Claws." Don't let the smooth looks of this one fool you, you may become one of those who let frustration take over, and leave this puzzle forever unsolved. Dedicated to the true puzzler!

EQUA

• This sphere-shaped cast metal brainteaser puzzle represents a planet and its surrounding ring. Positioned snugly inside the ring, the planet looks as if it cannot be removed. It may appear that all you can do is rotate it on its axis, but is that really the case? By Oskar van Deventer.

HELIX

• Though inspired by a budding Morning Glory, Helix is no gentle flower. The twining tendrils of this puzzle feature engraved grooves on two rotating spirals. The grooves cross at right angles, creating square holes at their intersection points. Can you bring this bud to bloom and free the helix ring? Designed by Akio Yamamoto.