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

Andrew Buchanan andrew at anselan.com
Sat Jun 18 14:21:58 EDT 2011

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

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.


-----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.


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