[Retros] Add units: 8th update

[Alain BROBECKER]

Dear retro friends,

Previous update contained two errors in diagrams N1QCi and N1QAl.
Sorry for the disagrement. Here is a corrected version:
  http://abrobecker.free.fr/chess/addunits.pdf

Sincerely, Alain

Alain Brobecker (abrobecker at yahoo.com) |_  _  _ |_
http://abrobecker.free.fr/             |_)(_|(_|| ) of  Arm's Tech