[Retros] "Retrovariants in helpmates with two white castlings"

[liskov]

Joost de Heer wrote:


> In SG 19, there's an article about castling/pRA in helpmates, by Valery

> Liskovets. There are 2 originals in this article.


The article contains also four problems (namely ones by
Kuntsche, Hannemann, Molnar and Luttgens) in revised form.
Moreover, ten h#-problems are interpreted with a revised
stipulation: 'pRA' instead of '2 sol.'
[Remarks for readers. These are problems #10-18, 20 and
22, and in all of them '2 sol.' should be given in brackets.
#24 is correctly represented by Joost (thanks!) but in the article,
4 black pieces are missing in it. There are also minor misprints.]

The text of the article is available upon request.

Valery L.