It’s very difficult to chance for uchicago without having seen the essay, because really the essay is the thing that ties the whole app together. Chicago wants to admit people, not numbers. They will look at your essay in relation to your extracurriculars and rec letters and try to see who you are. The best advice I can offer for your Uchicago app is to construct a package, an image of who you want to get across as a person. Make sure your essays compliment your activities and rec letters as well as the other way around. And love learning. That’s essentially the number one prerequisite to getting into Uchicago.