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.

Pioneer Railroad Equipment (PREX) GP20u puzzle, based on an original photo by Tom Binger (photo copyright Tom Binger -- used with permission). Photographed at Cisco, Illinois, November 25, 2011. Click here for more information about this photograph