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.

Chicago Transit Authority Railcar puzzle, based on an original photo by David Harrison (photo copyright David Harrison -- used with permission). Photographed at Chicago, Illinois, August 25, 2013. Click here for more information about this photograph