Can we do the impossible? The result of the calculation 4 (x.x) -4 (x.x-x) moves between zero and one. It makes a never-repeated movement. Correspondingly, the familiar puzzle, house X, is a quiz for a path in a finite graph that visits every edge exactly once. However, when transferred to the third dimension, it is an unsolvable puzzle. The installation is an absurde competition between the movements of a computer and a performer. The unfolding outcome is projected.