It's a puzzle, but it has for its delight a kind of solitary quality, both of the composer and of the solver of the chess problem.

它是一个谜语，却具有某种令人愉快的自我的特性，不论是设题的人还是解题的人都能感知到。

耶鲁公开课 - 1945年后的美国小说课程节选

And so if you choose to elect the hacker edition of this week's problem set the challenge will be to figure out not only how to implement the game but how to implement a solver for the game.

因此，如果你选择这周的应用题目为升级版,那么你将面临的挑战,不仅是如何实现这个游戏，而且,要实现此游戏的解决方法。

哈佛公开课 - 计算机科学课程节选