https://blog.wongcw.com/2020/12/28/alphago%e4%b9%8b%e7%88%b6%e5%b0%8d%e8%a9%b1%e3%80%8a%e9%80%a3%e7%b7%9a%e3%80%8b-%e6%9b%be%e8%a2%ab%e5%b0%8e%e5%b8%ab%e5%8b%b8%e9%98%bb%e7%a0%94%e7%a9%b6%e5%bc%b7%e5%8c%96%e5%ad%b8%e7%bf%92/