by Chase Gunnoe
CSX Transportation (CSXT) SD40-3 puzzle, based on an original photo by Chase Gunnoe (photo copyright Chase Gunnoe -- used with permission). Photographed at Wilow Island, West Virginia, January 1, 2020.
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.