Read this first:

http://us.imdb.com/Plot?0089594

They start a game of Go just before the war smashes their lives apart. They are interrupted just after one of them makes a very provocative (in my own miserably informed opinion) move and do not meet again until well after the war. They are walking along on the Great Wall and the player whose turn it was names his next move and they're right back in the game.