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.
Salamis Island
The oldest known counting board was discovered on Salamis Island in 1899. It is thought to have been used by the Babylonians in about 300 BC and is more of a gaming board rather than a calculating device. It is marble, about , and has carved Greek symbols and parallel grooves.