规则Rules：
标准数独基础上，每个涂色区域内都是1~9不重复。
Classic rules applied. Additionally, numbers cannot repeat in each colored zones.
◆例题 Example
◆在线涂鸦 Draw it Online
◆在线做 Do it by CTC
◆在线做 Do it by Penpa
设计主题Theme：
汉字“噩”（The Chinese Character, means nightmare）🌚
