规则Rules：
标准数独基础上，灰色数字有且仅有一个是错误的。
Classic rules applied. Additionally, there's only one false number in grey numbers.
◆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“点”（The Chinese Character 点, means dot）🎲
