规则Rules：
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.
◆在线涂鸦 Draw it Online
◆在线做 Do it by CTC
◆在线做 Do it by Penpa
