by Tom Nelligan
MBTA GP9 puzzle, based on an original photo by Tom Nelligan (photo copyright Tom Nelligan -- used with permission). Photographed at Lowell, Massachusetts, August 9, 1985.
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.