An old game that once again aroused people's interest in the 20th century. Today, mathematicians also put
It has become a research topic.
Sometimes, some ancient games have long been forgotten by people, but because someone has discovered its previously unknown characteristics, these games will suddenly become unforgettable.
Five-grid domino is an example, and its invention seems to be traced back to an ancient game in China (dominoes produced in Xuanhe period in Song Huizong, also known as Xuanhe brand, namely Pai Jiu, Niu Pai and Tianjiu Pai, are still popular in some areas). At the beginning of the 20th century, Henry Doudney, the greatest inventor of English jigsaw puzzles, mentioned it. In the 1950s, Solomon Golon carried it forward. Golomb, a professor of mathematics at the University of Southern California, put forward some theorems about triples. A few years later, an article in Scientific American magazine caught public attention.