by Mike Molnar
BNSF Railway ES44AC puzzle, based on an original photo by Mike Molnar (photo copyright Mike Molnar -- used with permission). Photographed at Streator, Illinois, July 6, 2017.
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.