by Tom Binger
Respondek Railroad Corp. GP40 puzzle, based on an original photo by Tom Binger (photo copyright Tom Binger -- used with permission). Photographed at Granite City, Illinois, August 1, 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.