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.

SEPTA ADTranz M4 puzzle, based on an original photo by Charles Freericks (photo copyright Charles Freericks -- used with permission). Photographed at Philadelphia, Pennsylvania, May 7, 2017. Click here for more information about this photograph