标准数独基础上，相同颜色的格子里有相同的数字。
Classic rules applied. Additionally, same color owns same numbers.
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，圈内数字为A，则其周围有A个质数。符合条件的A均已标出。
Classic rules applied. Additionally, if the circle contains A, there are A prime numbers around it. All the cases fit the rules are marked.
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，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，这个题目有多个答案，但你只需要找到唯一确定的一格。
Classic rules applied. Additionally, this puzzle has multiple answers, your just need to find the unique certain number.
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.
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，两个涂色区域中，相同的位置对应的数字一致。
Classic rules applied. Additionally, in the 2 colored zones, same position own same number.
标准数独基础上，提示是框内数字之和，框内数字一定会重复。
Classic rules applied. Additionally, clue is the sum of the numbers in the cage. Numbers must repeat in each cages.
