规则Rules：

标准数独基础上，如果水平/垂直相邻的两格之间有一个钻石标记，那么这两格的差等于该行/列的第一个数字。符合条件的所有情况都被标记。

Classic rules applied. Additionally, if there is a diamond between two horizontally/vertically adjacent cells, then the absolute value of their difference is the same as the leftmost/topmost digit in that Row/Column. All possible diamonds are given.

作者Author：ZrLyg

◆在线做 Do it by CTC

◆在线做 Do it by Penpa

※排头兵是2024年GP2的题型（倒数第二题）。本题仅为练习之用。