by Ryan Nicolay
Union Pacific SD70ACe puzzle, based on an original photo by Ryan Nicolay (photo copyright Ryan Nicolay -- used with permission). Photographed at Cheyenne, Wyoming, May 18, 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.