Reading & Northern SD40-2 puzzle, based on an original photo by Andrew Hartmann (photo copyright Andrew Hartmann -- used with permission). Photographed at Hazelton, Pennsylvania, December 27, 2018.
Click here for more information about this photograph
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.