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

[Andrew Buchanan]

Hi Mu-Tsun,

I am far from being an expert, but as far as I understand, it is generally a
negative point if the initial diagram obviously contains promoted units.
However it is a positive point if promotion can be shown to have happened
during the course of the solution. Here the solution just involves sticking
missing units on the diagram, but I still think that the principle holds.
The third rook is an asset rather than a liability.

It also lightens the load on b4, making the play for that square more
interesting.

Has anyone made any headway with my own 1NA, please? There are lots of
promising tries, but I think none of them work for a single reason.

Regards,
Andrew.

-----Original Message-----
From: retros-bounces at janko.at [mailto:retros-bounces at janko.at] On Behalf Of
Mu-Tsun Tsai
Sent: 19 June 2011 01:53
To: The Retrograde Analysis Mailing List
Subject: Re: [Retros] Add units: 17th update (1RA)


> This last one is very fine.


Thank you! :)


> I agree, and can I suggest replacing WQc5 with WR?


Yes indeed, just another quick saving for the material.
Although I did try to avoid using promoted piece, but based on the economic
standard we're using here, we should do that.

Diagram:
http://www.janko.at/Retros/d.php?ff=8/PP6/1PR5/1BR5/P7/PkN5/NP1P4/2K5
(14+1) 

_______________________________________________
Retros mailing list
Retros at janko.at
http://www.pairlist.net/mailman/listinfo/retros