Double-dummy problem

This hand appeared in the May, 1994 Bridge World as a "bits and pieces" bit (or maybe piece) called "Mystery Feature".

      AK32
      AK
      32
      A8532
T98765      -
J           T9876
QJ          T87654
T976        QJ
      QJ4
      Q5432
      AK9
      K4

South to make 6N on DQ lead.



[UPDATE: Solution deleted; will post separately in a couple of days]

I have a couple of follow-ups to this post I hope to get to soon.