The origin history of jigsaw puzzle

The source history of Tangram is shared as follows:

Tangram is an ancient traditional intellectual toy in China. As the name implies, it consists of seven boards. These seven boards can be combined into many figures, about 1600 kinds, such as triangles, parallelograms and irregular polygons. Players can also combine them into various characters, images, animals, bridges, houses, towers, etc., or some Chinese and English letters.

Tangram, also known as Tangram and Wisdom Board, is an intellectual toy circulated among the people in China. It evolved from the banquet in the Song Dynasty, initially as an indoor game for literati, and later evolved into a folk jigsaw puzzle.

According to Lu Yiqing's "Cold Land Miscellaneous Knowledge" in the Qing Dynasty, "Song and Huang thought that there were several maps, and several squares had seven long sections, which were divided into twenty-five bodies and became sixty-eight. Several pictures of butterflies are very clear, but the system has been modified, and triangles are staggered into hooks, such as butterfly wings. Its formula three, its system six, its dozens of three, its variant, where more than one hundred.

Recently, there are seven clever diagrams, the formula is five, the number is seven, and there are more than a thousand kinds of changes. Things are small in shape, changing at will, and full of games, which are enough to relieve boredom and break the silence, so secular people like them. "

At present, puzzles are made up of a square cut into five small pieces and pieced together into various things, such as people, animals and plants, pavilions, cars, boats, bridges and so on. You can play alone or with many people. Some important geometric relations can be clarified by using puzzles, and its principle is the "complementary access principle" in ancient arithmetic.

Specific structure:

Tangram consists of the following seven boards. The complete pattern is a square: five isosceles right triangles (two small triangles, one middle triangle and two large triangles), one square and one parallelogram.

/kloc-One of the most popular jigsaw puzzles in the 0/9th century is the jigsaw puzzle. The popularity of Tangram is probably due to its simple structure, simple operation and easy understanding. You can use jigsaw puzzles to spell out your own designs at will, but if you want to use jigsaw puzzles to spell out specific patterns, you will encounter real challenges. This is the fun of jigsaw puzzles.

The jigsaw puzzle is simple in structure, and it is easy for people to mistakenly think that it is easy to solve its problems, but this idea is one-sided. /kloc-more than 0/600 patterns can be put together by puzzles, some are easy to spell, some are quite mysterious, and some are specious and full of contradictions.