by Tom Binger
Lhoist North America B23-7 puzzle, based on an original photo by Tom Binger (photo copyright Tom Binger -- used with permission). Photographed at Daysville, Tennessee, November 2, 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.