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.

CSX Transportation (CSXT) AC4400CW puzzle, based on an original photo by Kyle Yunker (photo copyright Kyle Yunker -- used with permission). Photographed at Morley, Tennessee, March 21, 2021. Click here for more information about this photograph