by Jeff Carlson
Union Pacific SD70M puzzle, based on an original photo by Jeff Carlson (photo copyright Jeff Carlson -- used with permission). Photographed at Lawrence, Kansas, May 28, 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.