标准数独基础上，任意三个直线相邻（包含斜向）的格，如果中间一格数字是5，那么两端两格数字连续。Classic rules applied. Additionally, for all three numbers in linearly adjacent squares (orthogonally or 45-degree diagonally), numbers at both ends are consecutive if the middle one is 5.
标准数独基础上，提示等于其所有相邻格的乘积。
Classic rules applied. Additionally, the clue equals to the product of all the numbers adjacent to it.
标准数独基础上，数字从圆球开始沿着线条逐渐增大。
Classic rules applied. Additionally, numbers increasing from bulb on each thermometer.
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，每个区域内都是从左到右、从上到下的两位数，提示表示这些多位数从小到大进行排序的序号。
Classic rules applied. Additionally, digits in each region form multi-digit numbers from left to right, up to down in each zones, and the prompt indicates the sequence number for sorting these multi digit numbers from the smallest to the largest.
标准数独基础上，圆圈格子填奇数，方块格子填偶数。
Classic rules applied. Additionally, circle cells contain odd numbers, square cells contain even numbers.
标准数独基础上，提示是其周围数字的积。
Classic rules applied. Additionally, numbers in circle is the product of the numbers around it.
标准数独基础上，提示是其周围数字的和。
Classic rules applied. Additionally, numbers in circle is the sum of the numbers around it.
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.
填入1~6，使得每行、列内数字不重复。每种颜色的区域内包含了2组1~6。
Write 1~6 to make numbers no repeated in each Row or Column. Each color contains 2 groups of 1~6.
