A crazy bounce behind the Kings' net put the puck at the skates of Los Angeles defenseman Drew Doughty, who attempted to clear it but instead bounced it off Toews' stick and into the net for the decisive tally.
Corey Crawford made 26 saves for Chicago.
The Kings dropped their fourth straight despite two goals from Ryan Smyth and one by Michal Handzus.
Jonathan Quick let in four goals on 28 shots for Los Angeles.
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