by Josh Putman
Norfolk Southern ES44AC puzzle, based on an original photo by Josh Putman (photo copyright Josh Putman -- used with permission). Photographed at Coalburg, Alabama, September 15, 2021.
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.