标准数独基础上，某一个数字是标杆。有＞的格子内的数字比标杆大，有＜的格子内的数字比标杆小。
Classic rules applied. Additionally, there is a number as wildcard. Cells with＞contain numbers larger than wildcard, cells with＜contains numbers smaller than wildcard.
标准数独基础上，每个灰色区域中是一组连续的数字（可能是乱序）。
Classic rules applied. Additionally, in each grey regions, numbers a group of consecutive numbers (may out of order).
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，提示表示了其周围所有奇数的和。
Classic rules applied. Additionally, the clue is the sum of all the odd numbers around it.
标准数独基础上，提示数字表示从这一方向上观察，大数字能遮住不大于它的数字时，可以看见的数字的个数。
Classic rules applied. Additionally, clue shows how many numbers can be seen in this direction, when larger number will hide the ones no larger than them.
标准数独基础上，每一条线条上的数字都有着相同的奇偶性。
Classic rules applied. Additionally, numbers in each zone have same parity.
标准数独基础上，提示A的周围数字中，任意两个数字的差不是A。
Classic rules applied. Additionally, each two numbers around clue A, their difference cannot be A.
标准数独基础上，如果箭头格为A，箭头指向的方向上一定有A。
Classic rules applied. Additionally, if the arrow cell is A, then the direction the arrow points must contain A.
标准数独基础上，提示数字表示从这一方向上观察，大数字能遮住小数字时，可以看见的数字的个数。
Classic rules applied. Additionally, clue shows how many numbers can be seen in this direction, when larger number will hide lower ones.
标准数独基础上，框内数字是多位数质数（左→右，上→下）。
Classic rules applied. Additionally, numbers are multi-digit prime (left-right, up-down) in cage.
