TOT 206 1989 Spring Train J4 closed path on Rubik's cube
Source:
March 7, 2021
combinatoricscombinatorial geometrygeometry3D geometry
Problem Statement
Can one draw , on the surface of a Rubik's cube , a closed path which crosses each little square exactly once and does not pass through any vertex of a square? (S . Fomin, Leningrad)