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，圆圈的周围不能存在圆圈里的数字。
Classic rules applied. Additionally, numbers around circle cannot exist numbers in circle.
标准数独基础上，每个宫相同的位置上，包括了一组1~N的数字（N是盘面的阶数）。
Classic rules applied. Additionally, same position of each Box, contains a group of 1~N (in NxN puzzles).
标准数独基础上，"大"字格填3456中的一个，"中"字格填2345中的一个，"小"字格填1234中的一个。
Classic rules applied. Additionally, 大 means one of 3 or 4 or 5 or 6, 中 means one of 2 or 3 or 4 or 5, 小 means one of 1 or 2 or 3 or 4.
标准数独基础上，给出的每条斜线上，数字不能重复。
Classic rules applied. Additionally, numbers cannot repeat on each given slant diagonals.
标准数独基础上，每个区域内的数字都能按从左到右、从上到下的顺序，组成一个电子表的时刻。
Classic rules applied. Additionally, numbers in each cage forms a time of electric clock in order (left to right, up to down).
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.
填入1~5，使得每行、列，以及一组由线条串联的区域内数字不重复。
Fill the grid with 1~5, make numbers no repeated in each Row, Column and each region formed by chains.
标准数独基础上，每条线条上的数字之和等于圆圈里的数字。
Classic rules applied. Additionally, the sum of numbers on each line is the numbers in circle.
