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The hosts were quickest off the starting blocks, winning several corners in the early stages and fashioning the first chance of the game eight minutes in, when Mustapha Carayol's corner was nodded wide by an unmarked Elliott Ward.
Carayol stood out for the Terriers as the majority of attacks went through him on the left flank, though he failed to come up with a reasonable end product in the first 20 minutes.
Dougie Freedman's charges, however, went on to take the lead in the 23rd minute, with Daniel Pinillos's cross from the left nodded across goal by Eric Lichaj and into the path of the oncoming Ryan Mendes, who duly rifled home.
The game lost some of its edge following the goal, with the action becoming increasingly scrappy and Carayol failing to make as much of an impact as he did earlier on, his long-range shot in the 40th minute sailing well wide of Dorus de Vries's near post.
Huddersfield set about trying to get back on level terms after the restart, but Forest managed to frustrate their opponents early on in the second half with good possession play.
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Carayol, reinvigorated after the break, made a good run forward and squared the ball for Harry Bunn, who went for goal, but his first-time shot was charged down, while at the other end Michael Mancienne headed wide from a corner.
The home side appealed for another penalty just after the hour, but despite their shouts for handball, the referee once again played on.
Forest then had a chance to double their lead nine minutes later when a swift counter led to Chris Burke being left one on one with the keeper, but his effort ricocheted off the post, while O'Grady's rebound was cleared off the line by Martin Cranie.
Freedman's side would rue their miss because, with just six minutes left to play, Huddersfield found an equaliser through Huws, who picked the ball up 25 yards out and struck a fierce shot that took a heavy deflection and flew in off the underside of the bar.
Despite Henri Lansbury being given the chance to restore Forest's lead immediately after the restart with a free kick on the edge of the box, the resulting dead ball was sent way over as the Terriers hung on for a share of the spoils.