A fourth-down conversion in their own territory away from losing, the Niners finally capitalized with a rare touchdown in the final period on the way to their third straight victory.
San Francisco (7-4) overcame three turnovers.
Washington coach Jay Gruden won a challenge with 5:36 left that Vernon Davis hadn't made a first down. San Francisco went for it and Frank Gore converted the fourth-and-1. On the next play, Colin Kaepernick hit Anquan Boldin for a 29-yard gain and safety Ryan Clark was flagged for a 15-yard unnecessary roughness penalty for his hit on Boldin.
Copyright 2014 by The Associated Press