下棋 

Pinyin: xià qí  
Meaning：Play chess
Sentence: 要下棋这样的光线还是够亮的。It is light enough to play chess.

More: 

下： 

Pinyin: xià
Meaning: Lower; latter; underneath; under
Radical: 一
Stokes: 3
Traditional: 下
Common words/Phrase:
下午 [xià wǔ] 【afternoon】
下班 [xià bān] 【to come or go or get off work】
下面 [xià mian] 【next; under】
下降 [xià jiàng] 【to decline】
下雨 [xià yǔ] 【rainy】

棋： 

Pinyin: qí
Meaning: chess
Radical: 木
Stokes: 12
Traditional: 棋
Common words/Phrase: 
棋子 [qí zǐ] 【chessman】 
棋盘 [qí pán] 【chess board】 
棋局 [qí jú] 【game of chess】 
棋手 [qí shǒu] 【chess player】 
棋逢对手 [qí féng duì shǒu] 【be well-matched in a contest】