[Retros] Die Schwalbe Heft 228, december 2007 again -- retractor history
retromode at web.de
Tue Jan 15 04:27:46 EST 2008
I would like to give some more information about the background of my problem, in addition to that given by Thomas (with whom I agree):
My problem was inspired by Klaus Wenda's recent papers in "Die Schwalbe" on retractors with a reflexmate in the forward play.
I discussed my problem with him, and I thought that it might be helpful for the solver if the information "with forward defense" were given with the stipulation.
But he pointed (a) to the historical interpretation of Hoeg retractors (cf. Dittmann's book) and (b) to the fact, that nowadays, also Proca retractors should be understood as being WITH forward defense, unless "without forward defense" is expressly mentioned in the stipulation.
Also the retro editor of "Die Schwalbe", Günter Lauinger, thought that "with forward defense" should not expressly be mentioned.
> -----Ursprüngliche Nachricht-----
> Von: The Retrograde Analysis Mailing List <retros at janko.at>
> Gesendet: 14.01.08 23:14:47
> An: The Retrograde Analysis Mailing List <retros at janko.at>
> Betreff: Re: [Retros] Die Schwalbe Heft 228, december 2007 again -- retractor history
> The "historical truth" is just different from Joosts opinion: While
> Proca retractors were initially defined WITHOUT forward defense, the
> Hoeg retractors were! For a historical overview e.g. see the Dittmann
> book, pp. 154 - 158 and, on Hoeg retractors, Hoegs "On Retraction Chess
> Problems" (1927).
> So the 'retractor turn' is over not before the opponent decided which
> man if any to uncapture. After finalisation of the 'retractor turn' in
> this very sense Black may, if possible, play the forward defence. And in
> this way the "forward defense" definition makes sense for Hoeg
> retractors, too.
> Regards, Thomas
> Joost de Heer mailte am 14.01.2008 16:08:
> >> Joost did not find a cook in my problem, because the uncapture of a
> >> Bg5 is a correct solution,
> >> while the uncapture of a Qg5 is only a try and does not solve because
> >> of a forward defense.
> > IMO forward defenses don't work in Hoeg retractors. Black's 'retractor
> > turn' is over when he moves back a piece. That white adds an
> > uncaptured piece doesn't give black the chance to say 'Oh, but now I
> > want to play something else as a forward defense". No, black's
> > retraction turn is over.
> > Joost
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