Vierundfertig is based on the Connect 4 concept - the winner is the first player who manages to create a line of four cubes, either horizontally, vertically or diagonally. The board has a row of seven fields. The active player rolls a die, enters one of their pieces on any empty field and moves the number of steps rolled, either horizontically or vertically (climbing onto other pieces). In subsequent turns, players can choose between entering a new piece and moving a piece already on the board (provided no other piece stands on top of it). Towers that are seven pieces high are demolished and the pieces returned to their owners; if a player has no pieces left, the highest tower is taken down. First player to get 4 in a row is the winner.