Human vs machine Go showdown kicks off in Seoul

A 3,000-year old Chinese board game was the focus of a very 21st century showdown Wednesday as South Korean Go grandmaster Lee Se-Dol kicked off his highly anticipated clash with the Google-developed supercomputer, AlphaGo. Experts were reluctant to tip a winner between Lee, one of the greatest Go players of the modern era who has topped the world ranking for most of the past decade, and the computer, which has already crushed European champion Fan Hui in a 5-0 whitewash. AlphaGo's creators say