Die Schwalbe

3 problem(s) found in 3359 milliseconds (displaying 3 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND K='geduldeter Umwandlungsdual']

1 - P1273184
Wilhelm Hagemann
Horizont 1947
1. b7xa8=S! d5-d4 2. Sa8-b6 d4-d3 3. a7-a8=D,L#
play all play one stop play next play all
t/entfernte Springerumwandlung
t/alle Umwandlungen auf demselben Feld;
Henrik Juel: C+ Popeye 4.61 (except for promotion mate dual) (2020-10-24)
Keywords: Promotion (konsekutiv SD/L), Promotion in the key, under-promotion, Promotion in the mating move, Tolerated dual promotion
Genre: 3#
FEN: bB6/PP6/8/3p4/8/8/5K1P/7k
Input: Erich Bartel, 2013-06-26
Last update: A.Buchanan, 2020-10-24 more...
2 - P1287950
Hilmar Ebert
33 Stern 08/08/1991
(6+3) C+
1. 0-0-0! d7-d5 2. cxd6ep e4-e3 3. c7-c8=D,T# (UW-Dual)
play all play one stop play next play all
Henrik Juel: C+ Popeye 4.61 (apart from the promotion mate dual) (2020-09-26)
Keywords: Valladao Task, En passant, Castling as key, Tolerated dual promotion
Genre: 3#
Computer test: Popeye 4.61
FEN: 8/2Pp4/8/N1P5/4p3/P1k5/8/R3K3
Input: Erich Bartel, 2014-09-12
Last update: Alfred Pfeiffer, 2020-09-26 more...
3 - P1375286
Andrew Buchanan
James Malcom

PDB Website 30/4/2020
1. dxc7ep! b4 2. c8=D,T#

R: 1. ... c8-c6?! and earlier c8=sB
play all play one stop play next play all
Superseded by P1380851

Related: http://www.matplus.net/start.php?px=1577108437&app=forum&act=posts&fid=xshow2&tid=2395

The 2018 FIDE laws state: "3.7.2 on its first move the pawn may move as in 3.7.1 or alternatively it may advance two squares along the same file, provided that both squares are unoccupied."

Hence Black's newborn 8th rank pawn, which has never been moved before, reserves the right to commence a double-step on its first move, and likewise White receives the right to capture it en passant as they do with a 7th rank pawn.
Henrik Juel: This un-dummy-pawn is like a pawn created on c8 by the Einstein condition
The retroplay looks wrong, what about 1... d8-d6!? 2.d7-d8=sB!? c6xYb5 (2020-04-30)
James Malcom: That makes much more sense Henrik. I have edited it accordingly. (2020-04-30)
A.Buchanan: You don't like Adrian's (: haha? What about :) then? In heraldic terms, it would be described as "regardant". See 270 on https://www.heraldica.org/cgi-bin/atlas.pl?12. I don't know the word for "non-regardant", which is the default direction for the head, e.g. most of the others on that page.
We could replace wBa6a7 with wSa6, but alas having the 3rd knight is non-thematic & distracting. The other thing I would've liked to do is empty b2 so the promotion is forced to be to D. Such a tiny problem should have precision promotion. Needs more thinking. (2020-05-01)
James Malcom: UPDATE: The position has been edited to have one less piece and a precise queen promotion. (2020-10-12)
A.Buchanan: There is dialogue here which is now orphaned by a change of diagram with new matrix. Suggest we revert to the older diagram and mark it superseded by a new PDB entry here (2020-10-12)
James Malcom: I agree-it is now done. (2020-10-12)
more ...
Keywords: En passant, En passant as key, Joke, Joke promotion (b), Tolerated dual promotion (D/T), Promotion (D, T), Superseded by (P1380851)
Genre: 2#, Retro
FEN: k7/PN1N4/PKpP4/1p6/8/8/8/8
Input: James Malcom, 2020-04-30
Last update: A.Buchanan, 2020-10-12 more...
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The problems of this query have been registered by the following contributors:

Erich Bartel (2)
James Malcom (1)