[Retros] Die Schwalbe Heft 228, december 2007 again -- retractor history

[Thomas Brand]

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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