Sequence Cube by Aleksandr Leontev

 

This is the printed version from Aleksandr also known as 136 Minutes Cube - 8190 moves, with extra piece 205 Minutes Cube - 12282

Here’s what Kevin wrote:

“The sequence cube was an incredible design by Aleksandr Leontev which he shared with me at the beginning of the year and when he tried to make a copy discovered that it proved to be impossible to construct in a stable manner. As a compromise (which probably actually saved my sanity) he created a variant with only a single removable piece rather than entirely dismantleable. This was called either the 136-minute cube or 205-minute box depending on which pieces were used. Those numbers were supposed to denote how long it should take but in my case, the numbers were considerably higher! It was a wonderful piece of 3D printing and a masterpiece of N-ary puzzle design.”