The Covanent is a 3D printed plastic burr puzzle designed by Tamas Vanyo and made by Rex Rossano Perez. The goal is to free the four pieces from the frame and then reassemble to its original state. Aptly named, this puzzle resembles the shape of the Ark of the Covanent, a rich chest that carried the ten commandments.
Difficulty: 57 moves (29.18.7.3) The brackets indicate the breakdown of moves to free each piece sequentially.