Jigsaw puzzle is a popular kind of intellectual game. It has many changes and different difficulties, which makes people keep playing.
Modern jigsaw puzzles are mostly made of cardboard, so the cost is lower and the manufacturing process is simpler. The pattern of the jigsaw is the entire art print that is pasted on the surface of the cardboard before cutting. The content of the picture can be enlarged photographs, paintings, or other types of flat artwork. The mapped cardboard will be sent to a special embossing machine. This machine is equipped with a steel tool set according to a predetermined pattern combination. The cardboard will be cut into zero pieces by the tool set after strong punching by the machine.
The pictures of the puzzle are mostly based on natural scenery, buildings, and some familiar patterns. Castles and mountains are two traditional themes, but any picture or video can be used as a jigsaw material. Some companies also provide services for making private photographs into puzzles. Common plane puzzles have different specifications such as 300, 500, 750, 1,000, etc .; currently the largest size puzzle is 24,000 pieces / set. The mainstream puzzle layout is 38 × 27 pieces / set, a total of 1,026 pieces; 500 pieces / set is 27 × 19, 513 pieces. The size and number of children’s puzzles are even more varied. Other types of puzzles have patterns printed on both sides of the pieces. Players can assemble patterns according to the patterns on either side, and the difficulty of the game also increases, because it is difficult for players to determine which side is the part The right side. In addition to traditional flat puzzles, there are different kinds of three-dimensional puzzles. The three-dimensional puzzle pieces are mostly made of more solid materials such as wood or foam. Its spatial characteristics often lead to an increase in difficulty, requiring players to stitch pieces in a specific order: if the pieces are not properly assembled, the remaining pieces are likely to continue to be stitched up. Another type of toy called a “puzzle box” is also very common: players can use interlockable parts like flat puzzle pieces to assemble small drawers or boxes that can store items in the middle. The spherical puzzle can be seen as an intermediate type between a flat puzzle and a three-dimensional puzzle. Similar to the plane puzzle, its spherical surface is a single-layer structure composed of cardboard pieces; and its final shape is a three-dimensional shape with long, wide, and high attributes. The patterns of spherical puzzles mostly imitate geographic and astronomical models such as globes and moons. The logo of Wikipedia is an example of spherical puzzles. In addition, there are softwares that can simulate real jigsaw puzzles in the form of computer graphics. The advantages of this kind of virtual jigsaw are that they do not need to be manually cleaned up and there is no risk of losing pieces.