"Chess by thirteen" is the emergence of a Song Dynasty occupies a special place in the history of Chinese chess development works. "Chess was thirteen," the value, first of all is that it's systematic. Chinese classical theories of Go, from Yin Wenzai and Tai Shu Wen Zi counting in by Ban Gu "Yi purpose," Ma Rong, "Go Fu" and so on, to the Dunhuang Manuscripts "move through" and Wang Ji-paid "ten tactics>, and eventually began systematic. But really set up a system, but also a "chess was thirteen." This marks the Chinese classical Go theoretical development to a new height.