Fake news.
On August 12, 1833, the Town of Chicago was organized with a population of about 200.
Further details here: http://www.pbs.org/wgbh/americanexperience/chicago/timeline/index.html/
That's the route I booked for the game last month, before the visa changes.
As such, I didn't make it to the game.
As an aside Gdansk is rubbish compared to either Warsaw or Krakow.