by Anthony Paci
Norfolk Southern GP38-2 puzzle, based on an original photo by Anthony Paci (photo copyright Anthony Paci -- used with permission). Photographed at Wilmington, Delaware, September 22, 2015.
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.