This would be insane, but it would take the cooperation of several people at once.
suppose, Inhuman grants an X in the center square, the first move...
The questions to the two contestants could be about something not easily googleable like identifying a frame from a movie or a match game where a blank has to be matched correctly, or the person has to write a good line in "the Sonic Youth story," for instance. A link for a flash game could be given and the contestant has to post a screenshot showing their completion of the task to gain the square.