by Jake Miille
BNSF Railway ES44C4 puzzle, based on an original photo by Jake Miille (photo copyright Jake Miille -- used with permission). Photographed at Canyondam, California, September 8, 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.