数独的难度是可以选择的。
实验结果表明，该方法能够有效解决数独问题。
Experimental results show that this method can effectively solve the sudoku problem.
我本人是在浴室里放一本数独书，每天做那么一点。
Personally, I have a Sodoku book in the bathroom and do a little each day.
有些游戏需要一个播放器：高尔夫、纸牌、数独。
Some games require a single player: golf, solitaire, or Sudoku.
点阵中有一些方格已经在实验开始时赋予了颜色，来模拟实际中的数独游戏。
A few squares were given color at the start to simulate typical sudoku play.
他说，这个反向编译游戏设计引擎的计划，“本身就是世界上最好的数独游戏”。
That reverse-engineering project, he says, was like "the world's best Sudoku puzzle.
他说，这个反向编译游戏设计引擎的计划，“本身就是世界上最好的数独游戏”。
That reverse-engineering project, he says, was like "the world's best Sudoku puzzle.
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