"老人下棋" 用英语可以翻译为 "an elderly person plays chess."

来源：

"老人" 的英文是 "elderly person"，指年龄较大的人，通常指 60 岁以上的人。"下棋" 的英文是 "plays chess"，指一种智力游戏，由两名玩家使用 16 个棋子在棋盘上轮流走棋，目的是将对方的王棋吃掉。

一些英文例句及其中文翻译：

"My grandfather enjoys spending his afternoons playing chess with his friends."（我的祖父喜欢下午和朋友下棋。）
"I'm not very good at chess, but my grandmother is a pro. She always beats me."（我不是很擅长下棋，但我奶奶是个专家。她总是打败我。）
"The elderly man sat at the park bench, patiently waiting for an opponent to challenge him to a game of chess."（老人坐在公园的长凳上，耐心地等待对手挑战他下棋。）