Yeah. That's one nice thing about Eliezer's fiction, when he writes a smart character, he actually tries to come up with smart decisions for them to make. Though I guess it's easier to have the character pull the solution out of a hat if you designed the puzzle yourself.
http://www.infinityplus.co.uk/stories/under.htm?2. 15-30 min read time, rated "pretty good" by me.
There are a couple of interesting features of this story that I would like to discuss - but I don't want to introduce any spoilers, so I'll just leave this here for now.