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.

Union Pacific SD40N puzzle, based on an original photo by Dave Zeman (photo copyright Dave Zeman -- used with permission). Photographed at Mount Prospect, Illinois, April 13, 2019. Click here for more information about this photograph