An article dealing with “Klan defensive retractors”, a new retro-kind (= a mixture of type Proca & Hoeg) invented by Klaus Wenda and Andreas Thoma is available for download! (PDF, 347K):
with special reference to the AntiCirce condition
by Klaus Wenda (Vienna) and Andreas Thoma (Groß Rönnau)
in memoriam Wolfgang Dittmann (+ 5th February 2014)
The article in German is available on Tomas Brand‘s retro-blog – http://www.thbrand.de/2015/03/26/vrz-klan/
E) 2…Ke8xQf8(Ke8)? 3.Qd1-f3 & 1.Qd8+ Sd1!
Diagram and solution for problem H is corrected by authors. PDF file is replaced.