by Tom Binger
Terminal Railroad Association of St. Louis GP38-3 puzzle, based on an original photo by Tom Binger (photo copyright Tom Binger -- used with permission). Photographed at Madison, Illinois, October 22, 2019.
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.