Polycubes are made from cubes that are glued face-to-face without overlap.
In polycube puzzles the player is usually presented with a set of such polycubes and he has the task to use then to assemble them to a certain shape.
Sometimes (especially when polycube puzzles are played on the computer) the cubes will be represented by other tokens.
... for two years, he became, in 1833, professor at the university of Königsberg[?], where he remained till his death. In his last years he was quite blind.
Throughout his ...