by John Shine
Union Pacific AC4460CW puzzle, based on an original photo by John Shine (photo copyright John Shine -- used with permission). Photographed at Allen siding, Colorado, July 1, 2018.
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.