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.

Northshore Mining SD40-3 puzzle, based on an original photo by Dave Schauer (photo copyright Dave Schauer -- used with permission). Photographed in Minnesota, May 14, 2021. Click here for more information about this photograph