填入1~9，使得每宫内及数字不重复，黑色格里不填数。
Write 1~9, make numbers no repeated in each Row, Column or Box. The black cells contain no numbers.
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).
填入1~8，使得每宫内及每行列（三种方向上）数字不重复。
Write 1~8, make numbers no repeated in each Box or each Row (in three directions).
标准数独基础上，提示数周围四个数字中，有一个数字是其余三个数字的和。符合条件的情况被全部标记。
Classic rules applied. Additionally, around each black dot, one of the numbers is the sum of other three numbers. All cases fit this rule are all marked.
标准数独基础上，任意对角相邻的两格数字不同。
Classic rules applied. Additionally, numbers cannot be same with all the numbers around it.
填入1~9，使得每行、列、宫内，以及每一组由灰色线条连结的格子里的数字不重复。此外，有一个宫分散成了若干个灰色格色格。
Write 1~9 to make numbers no repeated in each Row, Column, Box, and each group of cells linked by the curve. Additionally, one of the Boxs is seperated as the colored cells.
填入1~7，使得每行、列、宫内数字不重复。宫可能是锯齿状的，并且每个宫内不一定包含所有类型的数字。
Write 1~7 to make numbers no repeated in each Row, Column and Box. The Box may be irregular, and may not contain all kinds of the numbers.
标准数独基础上，每条线条上的数字之和等于两侧圆圈里的数字之和。
Classic rules applied. Additionally, the sum of numbers on each line, equals to the sum of the circles on the ends.
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.
