What is the historical evolution of Tangram?

Development process: First, Yan Ji Tu in Song Dynasty → Butterfly Wing Ji in Ming Dynasty → Then Tangram from early Qing Dynasty to modern times.

1, Yan jitu

The original front of the jigsaw puzzle is "Yan Ji Tu", which means greeting guests for dinner. The person who triggered this thought was Huang, a scholar in the Northern Song Dynasty. He first designed six rectangular boxes, which can be adjusted according to the number of guests at the banquet, and then added a small one. When all seven situations are put together, it will become a big rectangle, and the combination will change endlessly. It's almost like a modern jigsaw puzzle.

2. How many wings does a butterfly have?

Later, according to the principle of "swallow-wing map", Geshan in Ming Dynasty designed "butterfly-wing record", which consists of thirteen different triangular grids. Together, it is the shape of a butterfly spreading its wings. After being separated, it can spell out more than 100 graphics.

3. Tangram

Modern puzzles are developed on the basis of Yan Ji Tu and Butterfly Wing Ji.

game rule

Tangram is a kind of tangram, which uses seven tangrams to spell out ever-changing image patterns in various ways.

As shown in the picture, dividing a square board into seven pieces becomes a puzzle. These seven boards can be spliced into geometric figures, such as triangles, parallelograms and irregular polygons. It can also be spelled into various specific characters or animals, such as cats, dogs, pigs, horses, etc. Or bridges, houses, pagodas, or some Chinese and English symbols and numbers.