Other board sizes such as 13x13 and 9x9 may be used for teaching or quick games, but 19x19 is the standard size. Once played ... For a more detailed treatment, see Rules of Go. This is the essence of ...

So, what is Go? “It’s fun ... two players take turns placing black or white stones on a square board with a 19x19 grid. Whoever captures the most territory wins. But the strategies needed ...