[Retros] Add units: 17th update (1RA)

[Mu-Tsun Tsai]

However, if we really want to save some material, then the following should 
work:

http://www.janko.at/Retros/d.php?ff=8/PP6/1PB5/2R5/P1N5/PkN5/NP1P4/2K5

But this time the position obviously contains promoted units. So I won't 
like it as much as my previous one, unless for the purpose of saving 
materials.


Mu-Tsun