# https://www.youtube.com/watch?v=ZbLGiJmJtto

# https://www.youtube.com/watch?v=-PMNm1DBYUA

# https://j9981168.pixnet.net/blog/post/556503500-%E8%A9%B1%E8%AA%AA%E3%80%8C%E7%AE%AD%E9%A0%AD%E6%95%B8%E7%8D%A8%E3%80%8D%E9%81%8A%E6%88%B2

# https://sudokustudylib-tw.readthedocs.io/zh_TW/latest/base.html