The above is perhaps my favorite of the talks offered by the GDC vault. It talks in a very interesting way about the player freedom, emergent gameplay and instances of games. At minute 40 my favorite part of the talk begins when he discusses a specific instance of the game of Go, played in the late 1940’s. This game is chronicled in Yasunari Kawabata’s novel “The Master of Go”, or Mejin in Japanese. He discusses the varied layers of meaning that become ascribed to the game. If you have the time, it’s well worth a watch.