Really sad that the links have few details, and more than 1.5 hours later, no one's posted anything more.
The decision text is available here. The decision is by Judge Edmond Chang, appointed in 2010 by Obama to the United States District Court for the Northern District of Illinois. The case name is Illinois Association of Firearm Retailers v. City of Chicago (formerly known as Benson v. City of Chicago).
This link says that the lawsuit challenges five aspects of Chicago's law:
- the ban on any form of carriage
- the ban on gun stores
- the ban on firing ranges
- the ban on self-defense in garages, porches, and yards
- the ban on keeping more than one gun in an operable state