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.

Yorkrail GP9 puzzle, based on an original photo by Robert Butler (photo copyright Robert Butler -- used with permission). Photographed at York, Pennsylvania, April 18, 2018. Click here for more information about this photograph