The ancient board game of Go was one of the 5 mind sports which featured at the inaugural World Mind Sports Games, held in Beijing, China in October 2008. There were six gold medals in Go events, within thirty-five gold medals vied for by 2,763 competitors (560 of whom were Go players), from 143 countries. One feature of this Go games is that it was the first time in history an international tournament of professional Go used the Proposed Rules of Go conceived by Toshio Ikeda (1923-1974). This was deemed as an important trial of unifying the rules of Go.