标准数独基础上，任意两个呈马步的单元格中，不能有相同的数字。
Classic rules applied. Additionally, no two cells that is a knight-step away can contain the same digit.
标准数独基础上，两个涂色区域内，相同的位置数字之差为1。
Classic rules applied. Additionally, in 2 colored zones, same position own a pair of consecutive numbers.
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，箭头格指向的所有数字都比箭头格小。
Classic rules applied. Additionally, all the numbers the arrow points must smaller than the arrow.
标准数独基础上，提示表示从该格起（不包含自身），沿着水平或垂直方向直至盘面外侧，所有数字的和。不过这些和对应的方向顺序未知，且有一些被隐藏。
标准数独基础上，涂色格子填入奇数。
Classic rules applied. Additionally, colored cells contain odd 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.
填入1~5，使得每宫内及每行列（三种方向上）数字不重复。每行列可能没有包含所有的数字。
Write 1~5, make numbers no repeated in each Box or each Row (in three directions). Each Row may not contain all of the numbers.
标准数独基础上，每种颜色的区域内数字是一组1~6不重复。
Classic rules applied. Additionally, numbers 1~6 cannot repeat in each colored region.
