The direct cause of jigsaw puzzle toys comes from ancient furniture "Ji". In the Song Dynasty, Huang wrote "Yan Ji Tu". Yanji is a banquet. It consists of six pieces, and can be spelled into various shapes according to the number of banquet guests. Yan Cheng improved Yanji map in Ming Dynasty, and the puzzle was changed from 6 pieces to 13 pieces. This figure is no longer a square, but a triangle and a trapezoid, which is called a "butterfly diagram". Butterfly paintings spell out more patterns than Yan paintings. With a little improvement, Yan Jitu became a jigsaw puzzle.
Tangram is the crystallization of mathematics and art, and scholars of past dynasties often collate and publish its representative works. From the Jiaqing period of Qing Dynasty to the early years of the Republic of China, six spellings of maps were published. Tangram was deeply loved by ancient people, especially ancient women. Empress Xiaoquan, Xuanzong of the Qing Dynasty, spelled out the words "Liuhe Tongchun" with a jigsaw puzzle. Wu Ruyou, a painter in Qing Dynasty, painted a genre painting "Natural Coincidence", which shows a lady playing a jigsaw puzzle. Tangram spread overseas from about18th century, first in Japan, Korea, then in Europe and America. 1742 The book Shao Qing Yan Na's Wisdom Board published in Japan introduces the jigsaw puzzle. The newly edited Mystery of Children in China was published in Europe on 1805, introducing 24 maps of Qiao Qi. After 18 13, Britain, America, Germany, Italy, France and the former Soviet Union all published books about Tangram. Many world celebrities, such as Napoleon, Adam, edgar allan poe and Andersen, are keen on playing jigsaw puzzles.
Puzzles, also known as "T-shaped puzzles", can spell out more than 300 patterns with four simple puzzles, and we have to admire the wisdom of the ancients.
It is also worth mentioning that there are nine clever boards and twelve clever boards. There are two kinds of puzzles, one is a heart-shaped puzzle, and the other is an egg-shaped puzzle, also known as the "hundred birds facing the phoenix" puzzle, which is characterized by being able to spell out various lifelike bird patterns. Twelve cleavage plates are also called "twelve pieces of nerve-racking". According to legend, its ancestors were dominoes in China. Twelve puzzles with different shapes can spell out thousands of shapes. It can not only spell out many plane figures, but also spell out interesting three-dimensional figures.