Go (game)
Go is an abstract strategy board game for two players, in which the aim is to surround more territory than the opponent. The game was invented in China more than 2,500 years ago and is believed to be the oldest board game continuously played to the present day. 
A 2016 survey by the International Go Federation's 75 member nations found that there are over 46 million people worldwide who know how to play Go and over 20 million current players, the majority of whom live in East Asia.
Dunhuang Go Manual
The Dunhuang Go Manual or Dunhuang Go Classic or simply the Classic of Go () is the earliest surviving manual on the strategic board game of Go (). Dating from the 6th century, it exists as a single manuscript that was discovered in the 'Library Cave' of the Mogao Caves in Dunhuang, China by Aurel Stein in 1907, and which is now in the collection of the British Library in London, England.