Black to play: The black group doesn't have even one eye; Black must somehow attack White's weak stones.[sgf sgfUrl="http://www.usgo.org/news/wp-content/uploads/2012/04/2012_04_17_hardlifeanddeathpuzzle_yilunyang.sgf" theme="problem" href="http://www.usgo.org/news/wp-content/uploads/2012/04/2012_04_17_hardlifeanddeathpuzzle_yilunyang.sgf" class="alignright"][/sgf] Published in the April 17, 2012 edition of the American Go E-Journal. Yilun Yang 7P is one of the most popular go teachers in the US. You can reach him at yly_go@yahoo.com .