Originally posted by Jim Yingst:
I think it means got to 13, can't get to 14. That's what I meant, anyway. Though getting from 12 to 13 was challenging too. I've since gotten up to 17 using Google - not for a key or hints from others specific to this puzzle, but for general info. I retract my complaint about going from 7 to 8, in the sense that you ain't seen nuthin' yet. You will need reference materials for several along the way.