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.
标准数独基础上，每个灰色区域中，所有奇数的和等于所有偶数的和。
Classic rules applied. In each grey zones, the sum of all the odd numbers, equals to the sum of all the even numbers.
填入1~8，使得每行、列和每个管道上数字都不重复。
Write 1~8, make numbers no repeat in each Row, Column, Boxes and each pipe.
标准数独基础上，白点两侧数字之差为1。
Classic rules applied. Additionally, the white dot means the adjacent two cells around it are consecutive.
标准数独基础上，提示表示此行列内，1和6之间所有数字的和。
Classic 6x6 rules applied. Additionally, the clue indicate the sum of all the numbers between 1 and 6 in this Row/Column.
标准数独基础上，涂色格数字大于相邻的白色格内的数字。
Classic rules applied. Additionally, numbers in colored cells are larger than numbers in white cells adjacent to it.
标准数独基础上，每条对角线上数字也不重复。
Classic rules applied. Additionally, numbers cannot repeat on each diagonal.
标准数独基础上，涂色格等于其左右两侧数字之差，也等于其上下两侧数字之差。如果两侧只有一格则不做计算。
Classic rules applied. Additionally, the colored cell equals to the difference between the numbers on the left and right sides, as well as the difference between the numbers on the top and bottom sides. No necessary for calculate when two sides own one cell.
标准数独基础上，每个虚线框内数字不重复，角标是框内数字之和的范围。
Classic rules applied. Additionally, numbers cannot repeat in each cage, clue is the range of the sum of the numbers in it.
填入1~5，使得每宫内，以及每组由线条连结的四个单元格内，数字均不能重复。每根线条最多拐弯一次，且数字可能在行列内重复。
Write 1~5, make numbers no repeated in each Box, and each four cells linked by lines. Each line has at most 1 turn, and numbers may repeat in Rows and Columns.
