标准数独基础上，提示表示其周围最大的数字。
Classic rules applied. Additionally, the clue shows the largest number around it.
标准数独基础上，如果圆圈格子是A，线条上有A个数字比A大。
Classic rules applied. Additionally, number A in circle, A numbers larger than A on line.
标准数独基础上，涂色区域内包含两组1~6的数字。
Classic rules applied. Additionally, the colored region contains two groups of 1~6.
标准数独基础上，任意两个在线条上相邻的单元格，其中一格必定是另一格的倍数。
Classic rules applied. Additionally, each two numbers next on line, one is the multiple of the another one.
标准数独基础上，将任意格A的任意相邻格记为Ai。若对于所有的i，有A=Σ|A-Ai|，则将A格涂色，所有符合条件的A被全部涂色。
Classic rules applied. To any A in the grid, we set the cells adjacent to A is Ai. If A=Σ|A-Ai| in this cell, we colored it. All the possible A are marked.
填入1~6，使得每行、列、宫，以及每一组由灰色线条连结的单元格内的数字不重复。提示表示沿该方向观察，可以看见的摩天楼数，并且视线会沿着灰色线条拐弯。Write 1~6, make numbers no repeated in each Row, Column, Box, and each group cells combined by grey lines. The clue is the Skyscraper numbers on this direction, with seesights turn with the grey lines.
标准数独基础上，每个区域内的提示是区域内多位数的因数。所有的多位数都是从左到右、从上到下读出来的。Classic rules applied. Additionally, the clue is the factor of the multi-digit number in each region. All the multi-digit number is read from left to right, up to down.
标准数独基础上，提示A表示在该行/列之中，数字A是其左右/上下两相邻格的和（三个数字都位于该行列）。所有符合条件的A都被提示给出。
Classic rules applied. Additionally, clue A is the sum of the two neighbouring cells in this Row/Column. All the possible A are given as clues.
填入1~7，使得每行、列、宫内数字不重复。外提示是这一方向上的摩天楼数。
Write1~7, make numbers no repeated in each Row/Column/Box. The outside clue is the skyscraper number on this direction.
标准数独基础上，每种颜色的区域里都包括了1~9的所有数字。
Classic rules applied. Additionally, each colored region contains all kinds of numbers of 1~9.
