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.

Respondek Railroad Corp. GP9 puzzle, based on an original photo by Chris Zygmunt (photo copyright Chris Zygmunt -- used with permission). Photographed at Litchfield, Illinois, August 1, 2013. Click here for more information about this photograph