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.

Iowa Interstate Railroad GP38-2 puzzle, based on an original photo by Erik Rasmussen (photo copyright Erik Rasmussen -- used with permission). Photographed at Rock Island, Illinois, July 11, 2018. Click here for more information about this photograph