Die Schwalbe

1 problem(s) found in 1391 milliseconds (displaying 1 problem(s)). [PROBID='P0007092']

1 - P0007092
Karl Fabel
The Fairy Chess Review 12/1942
P0007092
(12+12)
Wieviele Züge umfaßt die kürzeste Beweispartie für dieses Diagramm?
Beide Parteien sind absolut Retropatt.
play all play one stop play next play all
In 'Kurioses Schach' wird angemerkt, daß es sich hier um eine Variation handelt.
Alfred Pfeiffer: Eine solche Aufgabe ist in FCR 12/1942 nicht enthalten! (2015-10-26)
A.Buchanan: Mysterious. If this one didn't appear in FCR 12/1942 then was it effectively anticipated by P1211899 which did appear then? Fabel was German and this was a British magazine. Weren't communications between the two countries limited in 1942? (2015-10-26)
Yoav Ben-Zvi: An identical position is reprinted in "The Problemist", January 1976 stating that it was published in Zadachy v Etudi 1/1963 with the straight-forward stipulation "Is the position possible?". A version with the 2 a pawns and 2 h pawns each advanced by one square (delaying but not avoiding retro-stalemate) was published as number 34 in "Introduction to Retrograde-Analysis" by Nikolay Beluhov. The intended solution is as follows: The last capture could not have been played by any of the pieces on the board so the piece that made the last capture must itself have been captured later, a contradiction proving the position is illegal. For a discussion of the mathematical nature of this argument see P0002611. Unfortunately the sophisticated argument is not really needed because the position is in Retro-Stalement (in Beluhov's version, close to it). (2017-12-24)
comment
Keywords: Non-Unique Proof Game, Illegal position
Genre: Retro
Reprints: 140 Kurioses Schach 1975
D27 feenschach 29, p. 114, 08-09/1975
Input: Gerd Wilts, 1996-8-13
Last update: Alfred Pfeiffer, 2015-10-26 more...
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Gerd Wilts (1)