by Sid Vaught
Norfolk Southern AC44C6M puzzle, based on an original photo by Sid Vaught (photo copyright Sid Vaught -- used with permission). Photographed at Abingdon, Virginia, November 28, 2018.
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.