Remove the inner piece...
and put it back to the original position.
This cube, designed by Oskar, a Dutch man, is a maze through which a loop was interwoven.
The position of the piece trapped inside can be changed by it being moved in a unique way. However, the dilemma is…how you remove that piece.
When first invented, the start point at which the piece can be removed was not fixed. However, following a suggestion by the late Mr. Nob, the furthermost position was made to resemble a face, and a clear removal start point was thereby designated.