它是一种需要动脑筋的数字推理游戏。在九乘九的方格里面，有三乘三的小方格，叫“区”。在这些格子里，填入一到九的数字。每个数字在每一行、每一列和每一区里都只能出现一次。不可以重复。所以叫“数独”。
tā shì yī zhǒng xūyào dòng nǎojīn de shùzì tuīlǐ yóuxì 。zài jiǔ chéng jiǔ de fānggé lǐmiàn ，yǒu sān chéng sān de xiǎo fānggé ，jiào “qū ”。zài zhèxiē gézi lǐ ，tiánrù yī dào jiǔ de shùzì 。měige shùzì zài měiyī háng 、měiyī liè hé měiyī qū lǐ dōu zhǐnéng chūxiàn yīcì 。bù kěyǐ chóngfù 。suǒyǐ jiào “shùdú ”。
It's a kind of numerical reasoning game that requires mental effort. In a 9 by 9 grid there are 3 by 3 smaller grids called ``blocks." In these squares, you fill in the numbers 1 to 9. Each number can only appear once in each row, each column, and each block. You can't repeat them. That's why it's called ``sudoku" [``numerical solitude"].