DeepMind's board game-playing AI, AlphaGo, may well have won its first game against the Go world number one, Ke Jie, from China – but but most Chinese viewers could not watch the match live. The Chinese government had issued a censorship notice to broadcasters and online publishers, warning them against livestreaming Tuesday's game, according to China Digital Times, a site that regularly posts such notices in the name of transparency. "Regarding the go match between Ke Jie and AlphaGo, no website, without exception, may carry a livestream," the notice read. "If one has been announced in advance, please immediately withdraw it." The ban did not just cover video footage: outlets were banned from covering the match live in any way, including text commentary, social media, or push notifications.

On Thursday, we asked Google about its new custom-made chip for artificial intelligence called a Tensor Processing Unit, or TPU. Google politely declined to answer Recode's questions, saying only that "more information is coming later." Later in the day, after we posted our questions, Google changed its mind and gave us some short answers to a few -- but not all -- of our questions, via an email from a spokesperson. This is a big one that Google did not answer. It probably is pre-trained, but we don't know for sure.

In episode five of Season two Ryan walks us through variational inference, we put some listener questions about Go and how to play it to Andy Okun, president of the American Go Association (who is in Seoul South Korea watching the Lee Sedol/AlphaGo games). Plus we hear from Suchi Saria of Johns Hopkins about applying machine learning to understanding health care data.