Work on a puzzle. It can be anything from the newspaper crossword or the new Sudoku puzzle.

解答谜题，可以是报纸上的猜字游戏或新的数独游戏等任何谜题。

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Physical exercise and engaging in novel brain-stimulating activities - such as the crossword puzzle or Sudoku - are two proven methods for helping keep your brain healthy.

体能训练及参与新鲜的刺激脑力的活动——比如字谜游戏或是数独游戏——就是两种经证实可助你维持大脑健康的方法。

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In this essay I tackle the problem of solving every Sudoku puzzle.

本文中，我处理了在解决每个数独迷题过程中遇到的问题。

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She is the first person I would ask if I was having trouble finishing a crossword puzzle or Sudoku.

FORBES: Don't Freak Out If You Hear Your Trust Is Defective

Seeing Kendall jotting figures in his newspaper, most riders assumed he was working out a Sudoku puzzle instead of estimating potential earnings from a five-year C.

NEWYORKER: Great Experiment