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.

Kansas City Southern de Mexico AC4400CW puzzle, based on an original photo by Matthew Chapman (photo copyright Matthew Chapman -- used with permission). Photographed at Saint Louis, Missouri, October 28, 2016. Click here for more information about this photograph