Bo Horvat scored 16 seconds into overtime, and the Vancouver Canucks stopped Chicago's five-game win streak with a 3-2 victory over the Blackhawks.
Alexander Edler and Markus Granlund also scored for Vancouver, which was coming off a 3-2 shootout victory in Dallas on Sunday.
Thatcher Demko made 29 saves in his third career NHL win.
The Canucks (31-32-10) pulled within six points of Arizona for the second wild card in the jumbled bottom of the Western Conference.
Elias Pettersson picked up an assist on Granlund's goal, snapping a tie with Pavel Bure and Ivan Hlinka for the franchise rookie record.
Jonathan Toews and Erik Gustafsson scored for Chicago (32-30-10), and Corey Crawford made 31 stops.