Introduce the book chess classics.

Thirteen Classics is a book in Song Dynasty, which occupies a special position in the history of China Weiqi. The value of Thirteen Classics lies in its systematicness first. China's classical Go theory started with Yin Wenzi and Uncle, and passed through Ban Gu's and Ma Rong's Fu. It was not until Dunhuang wrote the Book of Chess and Wang's Ten Laws that it was gradually systematized. But the real system is the Thirteen Classics. This marks the development of China's classical Go theory to a new height. Compared with the previous theory of Go, Thirteen Classics discusses some important issues more profoundly and comprehensively. In particular, the chapters related to the strategy and tactics of Go, such as "You can't do it without playing chess", "There is a first thing, then there is a first thing" and "There is a long way to go", are all wonderful insights, which is another great value of this book. In addition, the Thirteen Classics of Chess also expounds the quality and style of chess players for the first time. In the book, the criteria for evaluating the quality and style of chess players are put forward, such as "winning without words, losing without words" and "harmony without arrogance", which are considered to be related to winning or losing a game of chess and improving the level of chess players. These views are still praised by chess players today. Generally speaking, The Thirteen Chapters of Chess Classic summarizes the valuable experience of playing chess in past dynasties, and comprehensively inherits and develops the classic theory of Go in China. This is the most important theoretical work in the history of Weiqi. Since the Thirteen Classics came out 900 years ago, all the chess players in the past dynasties have been influenced by it. According to the Postscript of Thirteen Classics, as soon as this book came out, it was highly valued by players in Song Dynasty, including Liu Zhongfu. Everyone can recite these thirteen chapters.