What makes Chicago laws more tenant friendly than other cities?

[Danny Maller]

Everyone says that Chicago has laws that greatly favor the tenant over the landlord. I'm not getting good comparative search results so maybe someone with more Google-fu could provide some better search queries. I'm curious what makes Chicago better for tenants and out of curiosity what other cities have in place to extremes in favor of tenants, and cities to extremes in favor of landlords to get a gauge of how Chicago sits on the scale.