棋
棋 (qí) refers to "chess," "a board game," or "a chess piece." It appears in compound words and phrases related to strategy games. For example, 下棋想法 means "ideas about playing chess."
这盘棋你下得真好,我输了。
Zhè pán qí nǐ xià de zhēn hǎo, wǒ shū le.
You played this game of chess really well—I lost.
他买了一副新棋,想跟朋友试试。
Tā mǎi le yī fù xīn qí, xiǎng gēn péngyǒu shìshì.
He bought a new chess set and wants to try it out with a friend.
棋还没下完呢,你别着急走。
Qí hái méi xià wán ne, nǐ bié zhāojí zǒu.
The game isn't finished yet—don't be in such a hurry to leave.