规则Rules：
标准数独基础上，每一个涂色区域内的数字集，都是最大的涂色区域内数字集的子集。处理集合的包含关系时，相同的数字需要被视为不同的元素看待。
Classic rules applied. Additionally, each colored region's number group, is the subset of the group of the biggest colored region. When we talk about the groups, the same number will be also regard as different elements in groups.
