[Retros] Add units, 12th update

[Alain BROBECKER]

Dear retro friends,

Only one modification: added the improvement
of N1NAl by Thierry.
http://abrobecker.free.fr/chess/addunits.pdf

Best, Alain


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