标准数独基础上，每条箭头上的数字之和，等于圆圈里的一位或两位数。两位数的阅读方式是从左到右、从上到下。 Classic rules applied. Additionally, the sum of numbers on each line equals to the numbers, or the 2-digit numbers in circle. The 2-digit number should be read from left to right, up to down.
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，如果箭头格里的数字是X，那么箭头指向的方向上，一共有X种不同的数字。
Classic rules applied. Additionally, if the arrow cell is X, then there are X kinds of different numbers on the direction the arrow points.
标准数独基础上，提示表示从该方向看过去，前三格构成的三位数+中间两格构成的两位数+最右侧的数字的和。所有多位数都是从左到右阅读。Classic rules applied. Additionally, the clue represent the sum, of the 3-digit number in first 3 cells, and the 2-digit number in the next 2 cells, and the last digit. All the multi-digit numbers are read from left to right.
标准数独基础上，每种颜色的区域里都包括了1~6的所有数字。
Classic rules applied. Additionally, each colored region contains all kinds of numbers of 1~6.
标准数独基础上，线条上相邻两格数字连续。
Classic rules applied. Additionally, numbers next on line are consecutive.
标准数独基础上，如果箭头格是X，箭头方向第X格和箭头格有同样的奇偶性。
Classic rules applied. Additionally, if the arrow cell is X, the Xth cell on this direction owns same parity with this cell.
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，提示表示从该方向看过去的24个不同的6位数字排列的顺序，1最小24最大。
Classic rules applied. Additionally, the clue represent the order of 24 different 6-digit numbers, 1 is the smallest and 24 is the largest.
填入1~6，使得每行、列内数字不重复。每个砖块里的一位数或多位数都不相同，提示是所有砖块从小到大进行排序的序号。Write 1~6, make numbers no repeated in each Row and Column. Additionally, numbers or multi-digit numbers in each brick are different, the clue is the order for these numbers' order from small to big.
