Go

Go, also called Weiqi or Baduk, is an abstract strategy board game for two players who take turns placing black or white stones on the intersections of a grid, aiming to fence off more territory than the opponent; a stone or a connected group of stones is captured and removed once it is fully surrounded on all orthogonally adjacent points by the opponent's stones. Invented in China more than 2,500 years ago, it is believed to be the oldest board game continuously played to the present day, was counted among the four essential arts of the cultured aristocratic Chinese scholar, and had reached Korea by the 5th century CE and Japan by the 7th. The standard board is a 19 by 19 grid of 361 points, though beginners often start on smaller 9x9 or 13x13 boards. A 2016 survey by the International Go Federation's 75 member nations found more than 46 million people worldwide who know how to play and over 20 million current players, the majority living in East Asia.