by Steve Hardin
Norfolk Southern ES44AC puzzle, based on an original photo by Steve Hardin (photo copyright Steve Hardin -- used with permission). Photographed at Lindale, Georgia, December 30, 2016.
The "Easy" version of the puzzle has about 100 pieces, "Medium" has about 200 pieces, "Hard" is about 300 pieces. For the Online puzzles, see the Online Puzzle Tips.