To maximize your puzzling space, click on the Maximize button in the lower right corner of the puzzle screen for fullscreen mode. Click on it again to return to normal mode.

For more tips, see the Online Puzzle Tips page.

Canadian National Railway SD38AC puzzle, based on an original photo by Mike Molnar (photo copyright Mike Molnar -- used with permission). Photographed at Conneaut Lake, Pennsylvania, December 23, 2019. Click here for more information about this photograph