标准数独基础上，如果圆圈格子是A，则线条上有A个数字比A大。
Classic rules applied. Additionally, number A in circle, A numbers larger than A on line.
填入1~9，使得每行、列和每个管道上数字都不重复。
Write 1~9, make numbers no repeat in each Row, Column, Boxes and each pipe.
标准数独基础上，圆圈内为N，线条上有N个数字与N有相同的奇偶性。
Classic rules applied. Additionally, if the number in circle is N, there are N numbers own same parity with N on the line.
标准数独基础上，对于任何一个涂色格，其左右两侧之和，等于其上下两侧之和。
Classic rules applied. Additionally, to each colored cell, the sum of its left and right sides, equals to the sum of its top and bottom sides.
标准数独基础上，每种颜色的区域内数字是一组1~6不重复。
Classic rules applied. Additionally, numbers 1~6 cannot repeat in each colored region.
标准数独基础上，不等号展示了相邻两格的大小关系。
Classic rules applied. Additionally, ＞ and ＜ shows the larger number around it.
标准数独基础上，这个题目有多个答案，但你只需要找到唯一确定的一格。
Classic rules applied. Additionally, this puzzle has multiple answers, your just need to find the unique certain number.
两个标准数独有所重叠。需要填入1~6，使得其都被满足。
Two Classic Sudoku are overlapped. Put 1~6 inside to make both of them completed.
标准数独基础上，每个涂色区域中是一组连续的数字（可能是乱序）。
Classic rules applied. Additionally, in each colored regions, numbers a group of consecutive numbers (may out of order).
