https://blog.wongcw.com/2021/09/30/%e9%9b%b6%e7%99%be%e5%8a%a0%e9%80%9f%e5%83%85%e9%9c%801-8%e7%a7%92-farnova-othello%e6%ad%a3%e5%bc%8f%e4%ba%ae%e7%9b%b8-%e5%94%ae%e5%83%b9186%e8%90%ac/